LME40OP Linear Ball Bushing Works with 40mm (1 37/64") Shafts LME40OP Linear Motion Ball Bushing work with a 40mm Shafts, they are marked LME40OP, Size is 40mm x 62mm x 80mm, the Inner Diameter is 40mm, the Outer Diameter is 62mm and the Length is 80mm.