... . 4. OEM & ODM welcomed. Valve Seat Ring1. Engine parts valve seat ring is used for different egines, Automobiles ... , Marines, Air compressors, Engineering machines engine...etc.Engine Type: 6BT, 6CT, NH220, 6BT145, 6BTA, 6BTAA, ... .2. Wide range size for different bran engine. Cummins, Hino, Mitsubishi, Yamaha, Benz, Deutz, Komatsu, Caterpillar, Perkins, Volvo, Kia, ...