ELONG 18" Crossbow Bolts Carbon Arrows Archery Hunting Outdoor, Pack of 12 12 pcs/pack, 18 inch Shaft Length For Crossbow Xbows Hybrid Carbon Shaft DURABLE-The hight quality carbon crossbow arrow , the outside diameter of arrow is 8.8 mm, inside diameter is 7.62 mm, and improve thickness for increased durability Plastic Half-moon Nock, 125 Grains Field Points, 4 inch TPU Vanes