Roller Tube Materials : Stainless Steel, Stainless Clad Steel, Mild Steel (Zinc plated, Chrome plated, Hard Chrome plated, Self Colour), Aluminum or ABS ． Sprocket Tooth Details : RS40/50/60 * 9/11/13/14T , Single or Double Rows ． Sprocket Tooth Materials : Plastic, Zinc-plated Mild steel (S45C), or Stainless Steel (SUS304 or 316) .Driven Way: Chain ． Bearing Type : Precision Sealed (ZZ) ． Spindle Material : Stainless Steel, Zinc plated Mild steel, Chrome plated Mild steel, or Hard-Chrome Mild steel ． Spindle Details : Spring loaded, Female threaded, Male threaded, Milled flat, Cross Drilled or Upon Custom Fabrication ． Tube Coverings : Black rubber, Urethane Rubber, Vulcanized Urethane Rubber, PU, Anodized, Chrome plated, Hard Chrome plated, Polished or Upon Custom Fabrication