for 1.50-inch GP-2000, GP-2000R, GP-2000K1/K2/K3/K6, GD-2000K, OB-2000, OB-2000PT Kit: Main valve, Main valve seat, Main body bottom gasket, Main body top gasket, Body spacer gasket, Main valve gasket Kit no. K-2104 Armstrong Part No: D25179