Ball transfer unit,ball transfer bearing,SP/CP For light duty,medium duty,heavy duty applications. Ball transfer unit,ball transfer bearing,SP/CPModel Nr. M30Base fixing ball transfer units ... : low-carbon steel, stainless steelBall: low-carbon steel, bearing steel(GCr15), stainless steelFinishing: galvanizedMachine processing: mould punched Ball transfer unit,ball transfer bearing,SP/CP