This Avantco 17816587 start component set is a perfect replacement for the ones that came with select GDC-12F-HC, CPW-68-HC, and CPSS-68-HC series units. These components are a vital part of your unit's refrigeration system, as part of the compressor assembly. Broken or malfunctioning start components can prevent your unit from maintaining specifications and cause strain in other areas, so be sure to replace them promptly.