2 Holes Flange Mounted Ball Transfer Unit One Ball Transfer Unit d mm d1 mm D mm D1 mm h mm H mm L mm L1 mm S mm 5.5 25.4 42 50 24 30.3 56 69 1.2 2 Holes Flange Mounted Ball Transfer Unit with one inch (1"=25.4mm) main ball, used for heavy duty loads, The unit has 2 holes to be fixed, It can be used to build a multi-direction conveyor, moving goods, feeding machines and many more.