... ,6 inches,7 inches, 8 inches,10 inches,14 inches,20 inches, 25 inches, 28 inchesMaterial: SBR, NBR, POLYColor: Brown, ... roller at a certain time. TypeWheels TypeNestedSpec. (Inch)468101214202528External Diameter (mm)223±1.0223±1.0225±1.0255±1.0270±1 ... 0227±1.0258±1.0258±1.0258±1.0 Length(mm)100±1.0152±1.0200±1.0254±1.0300±1 ... ±1.0508±1.0635±1.0708±1.0Thickness of Rubber (mm)20±0.520±0.525±0.524.5±0.530.5 ...