Appion KTG520-R - Compressor Repair Kit for G5Twin Model KTG520-R G5Twin compressor seal repair kit Includes all the seals, o-rings, valves, and springs needed to rebuild the G5Twin compressor internalsThe KTG520-R includes all the seals, o-rings, valves, and springs needed to rebuild the G5Twin compressor internals. Bring your old G5Twin back to life with the KTG520-R!