Four Seasons 77586 Remanufactured A/C Compressor with Clutch All remanufactured compressors are built using the latest compressor technology available today and using strict remanufacturing processes. Tested for noise ,vibration ,durability,vacuum decay , and pressure decay to insure no leaks and longer life. Contains R-12/R-134a compatible gaskets, o-rings, or seals to properly replace the product