EXAIR´s Side Mount Kits make mounting on the side of an electrical enclosure possible when there is limited space on the top or side (NEMA 4 and 4X Cabinet Cooler Systems must be mounted vertically). The Side Mount Kits maintain the NEMA rating of large and small NEMA Type 12, 4 and 4X enclosures. They mount in a standard electrical knockout (1-1/2″ NPS). Side Mount Kits for NEMA 12 Cabinet Cooler Systems have an aluminum construction. Those for NEMA 4 and 4X Cabinet Cooler Systems are Type 303 or Type 316 stainless steel.