Our shaft mount gear reducers, known as the “Ultimate” Shaft Mount Gear Reducer comes in box sizes of 2-9 with ratios of 15:1 and 25:1. These are dimensional drop-in replacements for all major brands. They are the tapered bushing type (bushing not included but we have the tapered bushing kits). Units are assembled with “Ultra-high” quality NSK tapered bearings. They are all cast iron housings with case hardened shafts and gears, extended gear centers and tooth contact. Included is metal reinforced double-lip, spring-loaded oil seals. A torque arm is also included.