Horton's Lightning Strike MX Matched-Weight aluminum crossbow arrows feature 7075-T9 alloy for outstanding dependability and quality. Horton's Matched-Weight components optimize balance and accuracy, making this arrow the most consistently accurate aluminum crossbow arrow on the market. Vanes Length: 20" Weight (with 100-grain point): 432 grains Straightness Tolerance: +/- .003 at 20" Manufactures Website Address www.crossbow.com Warranty Information Warranted against manufacturer defects.