It is a Roller Wheel For Sliding Door in showcase system. It is put under the groove of E472. It works to make the door slide smoothly. It needs to be used in conjunction with the E472 and E422. It is an essential accessory in the construction of sliding doors. It weighs 0.009kg per each. Its length is 52mm. It is simple to assemble, easy to disassemble and it is robust and durable. The products of LingTong are green and environmentally friendly. If there are some relative needs, LingTong will provide the best service for you in exhibition construction.