Check the listing for details. Archery Arrows Nocks, Plastic ID 3.2MM/0.13" Insert 12Pcs Fluorescent Yellow. Color: Black, Condition: New. Listed at 9.83 USD. Materials:The arrow shaft is constructed from plastic material that is durable, easy to deform and lightweight, offering exceptional impact resistance. The double lock nock is designed with a large and deep groove to stabilize the bowstring position perfectly. Its outstanding cold resistance ensuring perfect adaptability across different hunting seasons.Relevant Usage:Standard nock size compatible carbon shaft, fiberglass, wood, aluminum arrow shafts of matching inner diameter. Archery hunting replacement is perfect for practice shooting and hunting, and carbon arrow shafts can be rotated to fit for compound/recurve bow, longbow and traditional bow. Plastic arrow nocks also work for competitive archery events, making them an indispensable part of the sport.