FMARTK36Roller Truck With Casters for 36" Deep FMA Series by Atlas Sound provides ease of mobility in installations utilizing FMA series 36" deep cabinets. The assembly includes 2 locking swivel and 2 rigid casters with a durable mounting plate. "Roller Truck" assembly is finished in durable black powder coat. It is a Recessed mounting plate assembly does not add un needed height to rack installations.