1:PVC rollers d:6-45 2:PVC rollers T:1-7mm 3:PVC rollers D:18-380 4:PVC rollers L:50-3500 PVC conveyer ... need maintenance, rotating flexible, durable, surface hardening,high gravity capablity and not easily deformed; make transportation even more ... , machinery, electronics, food, furniture, and metallurgical industries’ gravity roller conveyors, Kinetic energy storage system; Machinery and equipment ...