ToolPan brings you the best, top quality brands of tools and accessories at great, low prices. To ensure an AC unit runs properly, you need the correct couplers & fittings to establish a strong connection. Shop our AC Couplers & Fittings section to replace or install proper connections in your AC unit. Make sure to order quantities to keep on hand in your electrician tool kit, too. We have a variety of brands including Mastercool, ATD Tools, Robinair and many more. If you need a consult of which AC couplers & fittings will work best for your AC unit, give us a call at (888) 784-1615, our experts would be happy to help.