Hub City's Mina-Gear™ Gear Drives are available in power ratings from 1/8 to 3/4 HP and ratios from 6:1 through 206:1. Efficiency is 93 to 95%. AGMA Class 9 gearing for maximum torque capacity and quiet operation. Rugged 380 aluminum die cast housing for maximum gear and bearing support. Permanently lubricated. Dimensionally interchangeable with major brands.