... meeted Zinc plated rollersRoller diameter can be 25mm, 38mm, 50mm, 60mm, 76mm, 89mm,Free steel roller,Tapered steel roller,Grooved steel roller,Sprocket steel roller,Drive ... taper steel roller,Accumulating steel roller etc. Roller DiaShaftDiaTube ThicknessRoller LengthTube structureSurface ...