Pad Mount 1/2" Extension With SwitchesItem Information Includes 451 11605 Manifold, 530 4030 Switch Kit, and Two R134a Adapters Use with A6 Delco and Sanden Seltec Compressor with GM Pad Mount Additional Information Used with Original A6 Compressor, Complete Hi and Lo Side Pressure Protection Kit Compatible With John Deere Tractors1640, 2040, 2040S, 2140, 2350, 2355, 2550, 2555, 2650, 2755, 2855N, 2940, 2950, 3140, 3150, 3155, 3650, 4000, 4020, 4030, 4040, 4230, 4240, 4320, 4430, 4440,