JJGF630 Valve Flange Face Protection Plugs Provides cushioned protection for flange face ,This is a universal flange protection plug.You only need to provide the diameter of the big hole spacing, we can help you to match the appropriate plug, dust, corrosion, beautiful role. Size:1/2" to 74" Material: LDPE,low-density polyethylene Standard Color: Blue Custom-made color:Yellow,orange, black,red, green or other colors as per requirement Standards:Marine standard,ISO,GB,API/ANSI,DIN,JIS,BS,NF Custom-made:Resistant to temperatures from -50 degrees C to +60 degrees C.UV-stabilisedFlange Protectors manufacturers website:http://www.cnjujing.com/flange-protectors/