... Comply with ROHS, NBR, Silicone (VMQ), EPDM, Viton, etc.Characteristics Good physical and chemical properties.Hardness 20 to 90 shore A ... requested.Quantity Small order is accepted.Sample charge Free samples are available if standard size.Quick shipment 1-2 weeks. Packing ... of o ring, AS568, JS, Metric and BS o rings are all available. Good quality o ring tool