#6 Hose to 10mm Compression Union (1) S.U.R.&R.'s A/C Hose to Compression Fittings allow you to make instant repairs to A/C lines on hundreds of vehicles. .Repair failed collar crimps, sections of corroded line, cracks, kinks and more on any SAE or metric sized aluminum line for a fraction of the cost of replacement..On the car A/C line repairs made simple.Make connections easily by hand; no specialty tools required..Compression unions and adapters specifically designed for A/C line repair application pressures rated up to 600 PSI.Drastically cuts labor time AC1610M