Marksmen Thunderbolt Carbon Crossbow 20-Inch Arrows with Field Points (12 Pack, Dozen) 12-pack of 20-inch arrows with strong, lightweight carbon shafts 275.6 grains + a 125 grain field tip for just over 400 grains per arrow Comes with Halfmoon nocks and 125 grain screw in feild tips Arrow vane : 4" vanes , two blue one white Compatible with almost all crossbows