Product Details: Material: Carbon Shaft Length: 30inch Total Length: 31.5inch Weight: 33g Spine: 500 Outside diameter: 7.8mm Inside diameter: 6.2mm Feathers: 4 inch Turkey feathers Replaceable arrow tips,Nocks are not glued, can be adjustable,for draw weight 25-50 lbs Package includes: 12pcs Feather Carbon arrows Note: 1. Please do not shot at any hard things, like concrete wall or any hard substances. 2.When practice, players must wear protective gear and take some protective measures. Minors should use bows and arrows under the guardianship of their parents.