The Atlas Sound FMA44-25SA (stand alone) was designed with contractor input to meet storage and wire management needs for today and into the future. The unit features increased width for better wire management, and includes rear door. Construction for tops/bottoms/frames is 14 gauge steel with 16 gauge side panels. Hat sections provide rail slots and retainer holes for extra strength and two pairs of 11 gauge CRS adjustable mounting rails plated, drilled and tapped 10-32 with hash marks to indicate rack unit increments are included. Holes for optional surface doors are pre-drilled with threaded inserts factory installed to allow doors to be mounted after equipment is loaded. Hat sections are sized to facilitate standard 19" panels -handy for mounting "stick-on" modules and other hardware. Knock outs are provided on removable standard 2U panels (rear of cabinet top & bottom). These panels includes 3/8" KOs for BNC connectors (perfect for diversity wireless systems). A 10 RU open area space is provided on top sections to allow use Atlas Sound fan panels or 5000 series top panels. Finish is scratch resistant textured black epoxy. Plexiglass, perforated steel, and solid front doors are optional.