... supply all kinds of idler rollers. Stainless steel,galvanized steel,pvc,hdpe,rubber etc. Powered,free. rollerRoller DiaShaftDiaTube ThicknessRoller LengthTube structureSurface ... ,Carbon steel ,Stainless steel , Aluminium alloy galvanization\chromeplate\skin glue\plastic\injectiona.spring shaftb.mandrel shaftc.inside thread shaftd.outside thread ...