... green, brown, etc 4.ozone resistant Seal ring1.Y seal ring 2.Materials:NBR,CR,Vition,Silicone etc 3 ... Y Sealing RingSpecificationStandard or according to customer’s requirementsMaterial rubber (heat,cold,abration resistance)Hardness NBR : HS75A° ... -resistant, high/low temperature-resistant, wearing-resistant, oil- resistant, voltage-resistant,ect.ColorsVariousPacking Inner packing: ...