... Comply with ROHS, NBR, Silicone (VMQ), EPDM, Viton, etc.Characteristics Good physical and chemical properties.Hardness 20 to 90 shore A ... are highly welcomed, V ring, D ring, X ring are all available.Our advantages:1. Strong QC and R&D teams ... of current molds for all kinds of o ring, AS568, JS, Metric and BS o rings are all available. Good quality o ring ...