This is an A/C compressor sealing washer, sold as a part for Freightliner. This seal washer fits at the A/C compressor connection point to maintain a proper seal in the refrigerant line assembly. Pro Gear and Transmission offers this as a part for technicians servicing Freightliner A/C compressor connections.Interchanges:Freightliner 23-13205-000WA912-20-8762FeaturesA/C compressor sealing washerDesigned for A/C compressor connection sealing