Atlas Copco GA 15, GA 18, GA 22, GA 26 Parts List Latest Update, here with this catalog, you can find the most common used parts with parts numbers for your Oil Injected Rotary Screw Compressors. Feel free to contact us for the latest prices. Service kits Drive arrangement Air system - Air inlet Air system - Unloader assembly Air system - Air outlet - Pack - Floor mounted Air system - Air outlet - Pack - Tank mounted Air system - Air outlet - Full-Feature - Floor mounted Air system - Air outlet - Full-Feature - Tank mounted