Features and Benefits: 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; Make instant repairs to metric A/C lines on hundreds of vehicles. Perfect for minor repairs and large sections of line. Aluminum fittings will not rust or corrode. Long-lasting repairs made fast, easy, and affordable.