S.U.R.& R.Auto Parts AC50M A/C Compression Union Kit Repair damaged aluminum lines including pinholes, cracks, kinks, and more Includes 6 fittings sized 8mm, 10mm, 12mm, 15mm, 16mm, 19mm (qty. 1 each) Make connections easily by hand; no specialty tools required On-the-car repairs made simple Heavy-duty fittings designed specifically for A/C repair applications