... :black, white,red, green, brown, etc 4.ozone resistant Seal ring1.Y seal ring 2.Materials:NBR,CR,Vition,Silicone etc 3 ... : ≤32MPa Bud-Shape Ring≤50MPa Working Medium:Hydraulic OilCharacteristicsOzone-resistant, high/low temperature-resistant, wearing-resistant, oil- resistant, voltage-resistant,ect ...