• The Rare "Millstone Half-Wall" (Mo Pan Ban Bi) Ergonomic Pair | 33.0mm x 38.0mm | MPBB-1202E - ThePatinaProject
  • The Rare "Millstone Half-Wall" (Mo Pan Ban Bi) Ergonomic Pair | 33.0mm x 38.0mm | MPBB-1202E - ThePatinaProject
  • The Rare "Millstone Half-Wall" (Mo Pan Ban Bi) Ergonomic Pair | 33.0mm x 38.0mm | MPBB-1202E - ThePatinaProject
  • The Rare "Millstone Half-Wall" (Mo Pan Ban Bi) Ergonomic Pair | 33.0mm x 38.0mm | MPBB-1202E - ThePatinaProject
  • The Rare "Millstone Half-Wall" (Mo Pan Ban Bi) Ergonomic Pair | 33.0mm x 38.0mm | MPBB-1202E - ThePatinaProject
  • The Rare "Millstone Half-Wall" (Mo Pan Ban Bi) Ergonomic Pair | 33.0mm x 38.0mm | MPBB-1202E - ThePatinaProject
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ThePatinaProject

Rare "Millstone Half-Wall" (Mo Pan Ban Bi) Ergonomic Pair | Walnut Pair | MPBB-1202E

Rare "Millstone Half-Wall" (Mo Pan Ban Bi) Ergonomic Pair | Walnut Pair | MPBB-1202E

Size: 33*38mm
$68.00 USD
$98.00 USD $68.00 USD
Sale Sold out
Shipping calculated at checkout.

Product Description

Millstone Half-Wall Walnut Pair is defined by its "half-moon" profile. Choose it if that is the kind of shape or surface you enjoy.

Its Half-Wall (Ban Bi) form is part of its identity. Inspect the contour and surface arrangement in the gallery, alongside the exact measurements.

For a first pair, start with a size you can handle comfortably and a surface you enjoy touching. Compare the gallery and listed dimensions to find the fit you prefer.

About the Variety

This variety combines the legendary traits of the "Mo Pan" (Millstone) with a highly natural growth anomaly known as "Ban Bi" (Half-Wall).

  • The Classic Millstone: Famous for its dramatically squatted posture, recessed flat tip, and incredibly smooth, non-abrasive ridges.
  • The "Half-Wall" Mutation: During its natural growth, one side developed significantly flatter than the other, resulting in a distinct "D-shape" or half-moon silhouette.
  • Appeal: Collectors hunt for Ban Bi mutations because the flat side rests flawlessly against the palm, creating a unique, sliding tactile experience that feels closer to a worry stone.

Special Form: Half-Wall

Half-Wall, or Ban Bi, is the form named in this listing. The contour and surface arrangement are central to its identity.

Compare the outline in the gallery with the original characteristics below. Check each walnut’s listed measurements individually where the pair has different dimensions.

This listing is for the exact pair shown in the high-definition photos. Stock ID MPBB-1202E is a remarkably rare, meticulously matched pair of "Millstone Half-Wall" (Mo Pan Ban Bi) walnuts featuring a highly natural asymmetrical mutation. Ready for immediate shipping.

  • Stock: 1 of 1 (Single Inventory)
  • Variety: Millstone Half-Wall (Mo Pan Ban Bi)
  • Classification: Natural Anomaly / Flat-Sided Mutation
  • Dimensions: 33.0mm (Width) x 38.0mm (Depth)

[Characteristics of MPBB-1202E]

  • The "Half-Moon" Profile: Measuring 33.0mm in width and 38.0mm in depth, this pair is defined entirely by its flat-sided mutation. Because one wall is naturally flattened, these shells sit flush against the skin, offering a satisfying sliding and pressing mechanic instead of standard rolling.
  • Classic "Millstone" Smoothness: Despite the mutated shape, the surface retains the signature wide, sweeping ridges of the Millstone variety. It lacks sharp spikes, ensuring a frictionless and non-fatiguing handling experience.
  • Pocket Comfort: Because the mutation naturally reduces overall bulk, this 33x38mm pair is spectacularly slim. It is the absolute Everyday Carry (EDC), slipping discreetly into any pocket without a bulge.
  • Daily Use: The choice for a collector who desires the frictionless comfort of a Millstone, but wants the unique leverage of a rare natural mutation for mindful, worry-stone-style manipulation.

[Specifications]

  • Variety: Millstone Half-Wall (Mo Pan Ban Bi)
  • Stock ID: MPBB-1202E
  • Dimensions: 33.0mm (Width) x 38.0mm (Depth)
  • Texture: Smooth, wide ridges structured around a naturally flat-sided, half-moon mutation.
  • Best For: Enthusiasts seeking a rare natural anomaly, sliding manipulation, and supreme pocketability.
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ThePatinaProject
Kevin

Awesome

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Robin Waterbury

I am very happy with all my purchases and the attention given to each one. This is an outstanding company

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ThePatinaProject
Kevin

Amazing company! Everyone should buy their nuts from Zenwalnuts.com

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Anonymous

You are easy to work with and are great communication.

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Olivia

Incredible service, I ordered a pair that sadly could not be shipped on account of a website error. Normally that would be a red flag; in this case however, an agent reached out to me immediately, allowed me to pick out an even higher quality pair and included some very thoughtful gifts. I’m extremely satisfied with my purchase and what started out as a mistake will have me returning here first whenever I want to expand my collection.

Class acts!

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ThePatinaProject
Michael Gleesing

I ordered my Wenwans about 13 days ago. After contacting this company about a shipping issue they were able to solve it immediately as well as to rush the order. Literally just got mine today and they are absolutely gorgeous and very large! My Pair# is DGM-901. These are my very first high grades ones. Bought some crappy amazon ones for like 6 bucks to practice. I cannot wait to start my journey with these. I highly recommend this company for their outstanding customer service and quality control!

Thank you!

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Robin Waterbury

This company is Stellar. I’ve enjoyed the products I’ve Boughten for myself and gifts Ives given.

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Lori Coulson

Love that you have miniature walnuts for those of us who have small hands.

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ThePatinaProject
Anonymous

Great work! Keep it up

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ThePatinaProject
Chadwick Johnston

Really like your site. Love being able to choose the exact walnuts that I'm ordering.

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ThePatinaProject
Chadwick Johnston

These guys a great. Walnuts are high quality, and what you see is what you get, no random pairs that you may not like.
I've got 5 pairs off of them so far, and none have any flaws: no yellowing, pin holes, worm marks or cracks.
I'm not an expert, but I can't detect any dyes or processing on the nuts I have received.
They get back to you quickly if you have questions or issues.

Shipping is a couple weeks to canada since its off shore orgin. No big deal.

I do wish they would post the weights of the pairs as well in the listings, but this is minor.

I consider Zenwalnut to be the best north american walnut vendor hands down.

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DAN CHONG

Good

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Anthony

The box it came with is great and well made. The walnuts are out of this world. I don’t know how you find a three ridge mutation (Spartan motif) with such a good pairing. Even the basins complement each other, one elavated and the other depressed so they fit together. I highly recommend this seller if you want a reliable place where you can find rare, high quality walnuts. What you see in the pictures and videos is what you get. These are my second pair from zenwalnuts and I love both of them, thank you

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ThePatinaProject
Justin Lehner

The first pair I bought was a pair of minis, Packaging was amazing! Display case, and brushes were all under $100. I've been using them for just over a week. Excellent quality, I have dropped them once on accident of course over concrete while outside on the patio. I was quite concerned, I gave them a look over and no cracks, chips, or scratches were found. I am now looking into higher valued pairs. I will be buying other pairs for birthday gifts and collections. I posted them on FB and will continue to keep updates of the transformation every so often.