We produce ball transfer unit, conveyor ball transfer unit ball bearing, conveyor equipment (1) light type ball transfer units (light burthen series) (2) middle type ball transfer units (middle burthen series) (3) heavy type ball transfer units (heavy burthen series) (4) ball transfer units which the ball can be used in up and down. 2. Applications Some typical applications include cargo and baggage handing, assembly lines, as a castor, machine loading, sliding-door systems, machine tables, etc. 3.OEM servise. 4.Drawings or samples accepted 5. High quality and low price Model: WA series, WB series, WC series, WD series, WE-A series, WE-B series, WE-C series, WE-C series, HA series, HB series, WS series, WT series, WA series, SP-A127, SP-B159, SPW127, IS series, SP series, IK series, IK-N series, KSF series,