... loaded GCS non-drive nylon gravity roller, stainless gravity roller, weld pipe gravity rollerRoller Dia ... ---- 1. carbon steel, stainless steel, pvc, nylon2. zinc-plating, galvanizing, chromeorplated3. Use press bearing or precision bearing4. shaft could ... could be made of nylon, weld pipe, stainless steel. For nylon gravity roller, the color could ... drive Gravity roller (Nylon, steel, stainless steel)