The "Wild Bison" (Ye Niu) Premium Heavy-Bone Deep-Belly Pair | 38.0mm x 40.0mm | YN-1402

This listing features the exact pair of walnuts shown in the photos. Stock ID YN-1402 is a naturally hand-matched, collector-grade pair of traditional "Ye Niu" (Wild Bison) scholar walnuts. This heavy-density pair measures 38.0mm across the primary horizontal wide edges and a generous 40.0mm in belly depth, exhibiting a robust, vertically rich deep-bellied architecture optimized for substantial hand volume, steady rotation momentum, and an commanding tactile presence. Ready for immediate shipping.

• Stock: 1 of 1 (Single Inventory)
• Variety: Ye Niu (Wild Bison Lineage)
• Dimensions: 38.0mm (Width/Edge) x 40.0mm (Depth/Belly)

[About the Ye Niu Variety]

The Ye Niu lineage, translated as the "Wild Bison," is highly celebrated among advanced collectors for possessing one of the most powerful, masculine topographies in the classic wood-bone hobby. It earns its unique name from its incredibly muscular shell structure: featuring broad dropped shoulders, extra-thick outer walls, and heavily sculpted vertical ridges that evoke the rugged, untamed power of a bison. Grown to full wild maturity, this old-lineage variety is highly prized for its immense physical mass, ensuring a deep, highly stimulating tactile roll across the palm.

[Product Characteristics of YN-1402]

• The Robust 40mm Deep-Belly Posture: Measuring 38.0mm across the primary wide horizontal edges paired with a full 40.0mm belly depth. This intentional 2mm inverse profile yields an exceptionally plump, substantial vertical posture. The nimble 38mm footprint ensures the pair is comfortable and effortless to navigate between your fingertips for rapid twirling, while the protruding 40mm depth actively occupies the core of the palm.
• Muscular, Deeply Sculpted Bone Waves: True to its premium pedigree, the shell showcases a magnificent network of thick, heavily carved vertical bone folds and open, flowing natural valleys. This aggressive texture completely avoids sharp spikes or fragile nodes, offering excellent high-grip traction against the skin while delivering an invigorating, therapeutic hand massage.
• Textbook Flat-Base Layout & Straight Seams: Built with exceptional organic alignment, each piece features a broad, expansive bottom layout with a clean centered navel that allows them to stand completely upright on flat surfaces. The vertical centerline seams run clean and neatly centered, ensuring a highly predictable path and a perfectly balanced distribution of its heavy unit mass.
• Resonant Iron-Bone Acoustics: Sourced from fully ripened wild heritage groves, this pair carries significant physical mass relative to its footprint due to extra-thick internal chamber walls. When rotated past one another, the mature bone-dense material produces a sharp, high-pitched metallic ring rather than a muffled wooden clack.

[Maintenance & Aging Advice]

Because the "Ye Niu" lineage features an exceptionally responsive, bone-dense shell structure with deep surface folds and thick borders, it is highly recommended to keep this pair in a sealed bag when resting between handling sessions for the first month. This practice safely traps natural skin oils to guide a uniform, blotch-free oxidation process across both the muscular prominent peaks and deep valleys. Handling them directly with bare hands—completely skipping the use of gloves—is the definitive method to naturally guide them toward a deep, high-gloss translucent crimson patina over time.

[Specifications]

• Variety: Ye Niu (Wild Bison)
• Stock ID: YN-1402
• Dimensions: 38.0mm (Width/Edge) x 40.0mm (Depth/Belly)
• Texture: Muscular, broad flowing vertical wrinkles and thick interlocking bone ripples structured around an elongated silhouette with a deep belly and a stable flat base.
• Best For: Enthusiasts seeking a nimble 38mm pair that delivers the heavy hand-filling volume of a 40mm deep belly, premium old-lineage symmetry, and a powerful tactile roll.