Amazon
High quality plastic material ,high pressture and durable Outer diameter:5/16inch,(8mm);Weight:0.9g / 14 grain Allows the nock to leave the string smoothly Use on diameter 7mm wooden / Bamboo tapered shafts. Package Include:50 Pcs arrow nock
High quality plastic material ,high pressture and durable Outer diameter:5/16inch,(8mm);Weight:0.9g / 14 grain Allows the nock to leave the string smoothly Use on diameter 7mm wooden / Bamboo tapered shafts. Package Include:50 Pcs arrow nock