Eagle technology allows an expanded, optimum, 500-percent gear range - a 20 percent increase over our other 1x drivetrains All new shifting features create a smoother, quieter system with enhanced inboard and outboard shift performance XD Driver Body compatible 10-50t 12s 10,12,14,16,18,21,24,28,32,36,42,50 Black/Gold 300gUPC/EAN/GTIN: 710845788314