Four Seasons 77549 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 ensure no leaks and longer life Contains R-12/R-134a compatible gaskets, o-rings, or seals to properly replace the product