Utility Grade Doors from CannonBall are economical designs intended for low to moderate traffic applications and are available with a full range of accessories. Utility Grade doors are designed to survive years of abuse while retaining an appealing look. All models feature aluminum frames, insulated panels, and stainless steel ranges.
Sliding Door Systems from CannonBall are manufactured of extruded aluminum and powder coated for a quality, lasting finish.
Cool-Air door systems were originally created for use on aircraft hangars with their over-sized door requirements. Now available for all types of applications, all Cool-Air doors are complete packages; each is specially engineered and manufactured specific to your building requirements.