... . 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, ... VT6-280 etc .2. Wide range size for different bran engine. Cummins, Hino, Mitsubishi, Yamaha, Benz, Deutz, Komatsu, Caterpillar ... provided according to the drawings or samples.