Gold Tip Accu-Tough Insert Kinetic 340-400 12 pk.. Adds strength and durability along with increased front of center. Specifications for Gold Tip Accu-Tough Insert: Manufacturer: Gold Tip Inner Diameter: 0.204 in Quantity: 12 Features of Gold Tip Accu-Tough Insert Constructed of stainless steel Spine specific fit 34 spine Package Contents: Gold Tip Accu-Tough Insert Insert for Kinetic Kaos and Kinetic arrows. (.204 ID) Features/Specifications: Small - 34 4 spineWeight: 24.8ge