Small 1:1 Gearbox Features: * gear ratio 1:1,2:1 * efficiency 95% * 2 ways,3 ways,4 ways * right angle changer Small 1:1 Gearbox / Small ... Gearbox Pictures: Small 1:1 Gearbox Detailed Information: ModelsRN-2M,4M,6M,7M,8M,10M, ... 12M,16M,20M,25MSpeed Ratio1:1,2:1,3:1,4:1,5:1. Special ...