Nightmare Xtreme X-Bow Arrows 20 in. 6 pk. 100 percent carbon bolt construction;Bolt length: 20 inches;Half moon nocks installed;Straightness tolerance: +/- .003 inch or better;Weight tolerance: +/- 2 grains;Inserts included and installed;Bare weight: 284 grains;Total weight with 100 grain tip: 384 grains;Tested for crossbows up to 500 fpstable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; } Item Category Code: 1000 Product Group Code: 1000A Product Sub Group 1: 1000A1 Product Sub Group 2: 1000A1B Inactive: No Pack Size: 6