Rubber joint & Expansion Joint: 1. Flange Material: Ductile Iron, Carbon Steel and stainless steel Ductile Iron flange can be coated with Epoxy paint (Blue and Grey color) 2. Standard of the rubber expansion joint: ANSI, DIN, JIS, GB and so on (as your technical drawings) 3. Rubber: EPDM NBR and Neoprene Rubber 4. Pressure: 5kg 10kg 16kg 25kg