The Coleman Mach 1 Air Conditioner Foam Block Kit is use on installations where the vehicle roof surface is extremely smooth and with normal unit gasket tension and the air conditioner may still be able to shift position. Coleman-Mach - the brand you turn to for quality ACs, Heat Pumps, Thermostats and accessories for RVs, boats, off-road vehicles and specialty applications. For Coleman-Mach air conditioners and heat pumps, innovation is a process of assessing customer needs and translating those needs into products. It is these innovations that have kept us at the forefront of the industry, and made the Coleman-Mach brand a trusted partner to RV manufacturers, dealers and enthusiasts everywhere. Easy To Install Compatibility: Coleman Mach Air Conditioner | Coleman RVP Coleman Mach 1 Air Conditioner Foam Block Kit