https://www.aircompressorcfm.com/product/fs-curtis-rotary-screw-8000-hour-maintenance-kit-fsk-nx45-55tuk/
FS-Curtis Rotary Screw 8000 Hour Maintenance Kit FSK-NX45-55TUK - Air Power Equipment OKC
FACTORY OEM PARTS FSK-NX45-55TUK TUNE UP KIT (INLET VALVE, INLET VALVE O-RING, MPV KIT, THERMOSTATIC VALVE KIT)