Nockmaul: 1 (ca. 0,088) Insert nock from Beiter. Key features: For G size shafts/ 4mm/ Ultra Micro/ .165 Each nock has only one single mould for the tightest tolerances and the highest precision. Nock grove shaped to to prevent pinching the string for a consistent release. Simple to install with an easy push-fit design. Asymmetrical design, made specifically for the most accurate shooting with fingers. Technical specifications: Type: Insert nock. Size: 4.25mm Groove Size: Small (1) Weight: 5.538grns Compatibility: Easton ACE, Uni-bushing system, ACC-00, Navigator, ACG, CarbonONE, NAV 1000-810, Victory VAP Carbon Express: .166 Gold Tip: Kinetic Pierce