Made of high-quality rubber, O-ring 0634349852 has high elasticity and resilience with fine oil resistance, corrosion resistance and wear resistance. It keeps stable shape without deformation after long compression for tight gap sealing. Its standard size fits original grooves well for easy installation. Applicable to multiple sealing positions, it matches full series of ZF 12-speed AMT gearbox and adapts to severe heavy-duty driving conditions.