... roller OD=32mm,38mm,40mm,50mm,60mm,76mm etc roller set Roller DiaShaftDiaTube ThicknessRoller LengthTube structureSurface treatmentErecting structureΦ16Φ61.2 ... ,Stainless steel , Aluminium alloy galvanization\chromeplate\skin glue\plastic\injectiona.spring shaftb.mandrel shaftc.inside thread shaftd.outside thread shafte.oblate ...