... competitive price. 4.ROHS approved. Details about o ring color code: Materials Comply with ROHS, NBR, Silicone (VMQ), EPDM, Viton, ... physical and chemical properties.Hardness 20 to 90 shore A or as your request.Tolerance Strictly upon international standard, no ... flash.Color Black, transparent, green, red, yellow, grey, purple, pink or as your requested.Quantity Small order is accepted.Sample charge ...