SAE AMS 3306D
Elastomer: Methyl/Methyl Vinyl Silicone, (MQ/MVQ), High Temperature/Gas Turbine Engine Oil/Phosphate Esther Hydraulic Fluid Resistant, High Strength/High Tear/High Modulus 55 to 65 Type "A" Hardness, for Products in High Temperature Environments/Gas Turbine Engine Oils