A revolutionary approach for field retrofit of A/C condensing units. The "Pack" of matched service parts and compressor, selected by BTUH, is conveniently packaged for the professional service technician. Available in all of the most common size required for service applications from 1 1/2 through 12 tons, single or three phase, reciprocating or scroll compressor retrofit. Save time by having all the quality parts you need the first trip to the unit. With POE oil.