Profile: M G M Products offers metal fabrication for HVAC industry. Our products include, adapter curbs, conventional roof curbs, equipment rails, metal roof curbs, structural plenum curbs, concentric and drum style diffusers, rooftop safety, walkways & conventional curb security bars. We have Retro-Zone™ adapter, which can service old multi-zone units with up to twelve zones per unit. We have speciality products, that include mixing boxes, with outside and return air dampers, access doors, economizer systems, filter mixing boxes, filter access doors, bag filters, TAW filters, hail guards, horizontal discharge curbs and custom louvered & vented curbs.