long life and high quality roller 1,material iron,nylon 2, high quality 3, diameter 40mm 4, height 50mm roller material iron, nylon height 50mm wheel diameter 40mm we can provide many kinds of wrought iron products with high quality and reasonable price. About Qingdao Benxiang Co.,Ltd1 The company occupied 25600m2, the building area is 19082m2.We has CNC bending machine, big forged machine, ...