Maximus ACS6PK Pure Carbon Slayer Crossbow Arrow, Pack of 6 100% carbon construction,+/- .0025 straightness tolerance 102-grain "hammer" insert for optimum front-of-center balance point High-visibility orange nocks 4" DuraVane flights,8.7 grains per inch Each Bolt is 20"l., nock to insert,Weight: 300 grams (minus point).