The Nockturnal Lighted Nock Red 3 pack Universal Fit is designed for versatility and reliability. This product is suitable for various types of arrows, including those with X, H, S, and GT nocks. The clear Polycarbonate material used in its construction ensures durability and visibility. Adapter sleeves are included to facilitate a secure fit on different arrow shafts. Fast shipping ensures that you can get started with your archery or hunting activities quickly. With its universal fit, this lighted nock is an excellent choice for those who need a reliable and easy-to-use accessory.Key Benefits and Features: Material: Super strong clear Polycarbonate Fits arrows using X nock and larger Adapter sleeves for GT, S, and H nocks