This is a standard Span Tech conveyor bearing that fit into the head and tail polymer housings. The bearing ID is 1.250″ and OD is convex shaped and 62mm in diameter. Outer race is 16mm wide and inner race is 17.5mm wide. There are two versions to choose from: 1. carbon steel housing; 2. plastic housing with stainless steel balls. For wash down environments choose option 2.