1/2" to 12" pecifications:Material: Low Density PolyethyleneColors: Refer to ChartSuitable for both imperial (ANSI) and metric (DIN) flanges to specifications DN 2627 - 2638, 150, BS 5504 and ANSIB16,5.Push-in Flange Covers,Plastic Flange Covers,DIN flange Protectors,2500lbs Flange Covers Push-In Flange Covers