1.5mm thick SS 316 cover plate, Cover plate secured with snap fit mechanism, Base Casting Material :-Alloy Steel, Gasket :- Non-Asbestos Material, Spring Steel (Special Metal) snap fit points for more strength, Strong cover which doesnt come out easily. SS-202 Bracket to Accept the Pivot Pin 15 mm with Variable adjustment of 55 or 65mm, Compatible with Ozone Floor Spring FS-8400, 9400, 10400 & 11400, High Grade SS316 Patch fitting, Finish: SSS.