FeaturesWelded 12 ga steel frame with integral strutsFront window door made of 16 or 14 ga steel with safety glass windowSolid 16 or 14 ga steel back doorStandard package has solid 16 or 14 ga steel sidesAC package has cutout for easy in the field installation of any CR29 series air conditionerModels available with EIA universal standard 3/8 in square or 10-32 tapped holesMobile base includes casters, levelers and gland plateGland plate allows easy routing of cable