This item is currently out of stock.
This is the OE gasket kit Coleman-Mach specifies for mounting or resealing a rooftop air conditioner to a standard 14 x 14-inch vent opening. Fresh gaskets here stop the rattles and air/water leaks that come with a compressed or dried-out original seal.
Worth replacing anytime you pull the A/C for service, or if you're noticing air or water getting past the roof seal.