rollerFree roller,Tapered roller,Grooved roller,Sprocket roller,Drive taper roller,Accumulating roller etc. Roller DiaShaftDiaTube ThicknessRoller LengthTube structureSurface treatmentErecting structureΦ16Φ61.2,1.550-1500PVC,Coat rubber,Carbon steel ,Stainless steel , Aluminium alloy galvanization\chromeplate\skin..