S.U.R.& R.’s A/C compression block off repair kit, No. AC80, allows the technician to block rear A/C lines in as little as five minutes. Designed for use on SUVs and vans with leaking lines or failed rear A/C components, the kit provides vehicle owners with a fast, affordable solution for keeping the front A/C system working. Coverage includes 3/8”,1/2”, 5/8” and 3/4”-sized lines. One fitting per line size (total of four fittings) is included. Featuring compression union style technology, all connections can be made by hand with standard wrenches. No specialty tools are required.