Killer Instinct HYPR Lite 20 inch Crossbow Bolts - 6 Pack. The High Velocity HYPR Lite bolts are engineered specifically to maximize the speed delivered by today's high-powered crossbows. Advanced Carbon Construction creates spine consistency for greater accuracy exceptional reliability and repeat performance. Precision sorted for straightness to +/- 0.003" for maximum consistency. 20" length fletched with 3" vanes 370 grains 0.346" Diameter 6 per pack inserted moon nocks. Specifications for Killer Instinct HYPR Lite 20 inch Crossbow Bolts Pack: Manufacturer: Killer Instinct Color: Black/Green Quantity: 6 Length: 20 in Weight: 370 grain 370 g Diameter: 0.346 in Overall Length: 20 in Nock Type: Moon Fletching: 3 inch Vanes Fabric/Material: Carbon Archery Application: Backpacking Features of Killer Instinct HYPR Lite 20 inch Crossbow Bolts Pack: Straightness - .003" Inner Diameter - .300" Outer Diameter - .346" Total Weight - 370 Grains (With 100 Grain Tip) Package Contents: Killer Instinct HYPR Lite 20 inch Crossbow Bolts Pack Killer Instinct 1065-6: HYPR Lite 20 inch Crossbow Bolts - 6 Pack