These are 2 output shaft bearings for the Borg Warner T-20 skid-steer transmission that was used for decades in many 6x6 amphibious all-terrain vehicles (AATV) and front-end loaders. These bearings are similar to the standard industrial 6207 bearings, but are narrower at 15mm wide (instead of 17mm) to fit this specific T-20 application. Standard 17mm wide bearings will not work; you need these 15mm wide bearings that are custom made and not widely available. The bearing dimensions are 35mm inside diameter, 72mm outside diameter and 15mm width. These are high quality ABEC 1 bearings, which is what is required for this application to accommodate heat expansion inside the transmission. Since 1969, T20 transmissions have been used in Attex, Camel, Chaparral, Hustler, IMP Kadoo, Max, Sears, Skid Steer, Starcraft, Swampfox, and many other 6-wheeled, Argo type vehicles.