800-643 Line Splice Repair Kit for 5/16 in. Aluminum Lines Works for A/C Coolant

800-643 Line Splice Repair Kit for 5/16 in. Aluminum Lines Works for A/C Coolant. 800-643 Line Splice fits for 5/16 in. Easy to install, no special tools are needed. Repair pinhole leaks, cracks, kinks, and rub through in air conditioning, coolant, transmission, oil, or fuel lines.