5848 N. 95th Ct.
Milwaukee, WI 53225

About ASI

Marathon High Speed, High Performance Door Systems

• Designed to eliminate the need for high wear parts.
• No roller wheels, belts, cables or extension springs to replace.
• Doors open and close within seconds.
• Available in custom sizes colors and styles including insulated or fenestrated grille style slats.
• Marathon Doors are made in the U.S.A.

Marathon, a division of ASI Doors, Inc. has been producing fast, reliable high performance doors since 1965.

GSA Contract Holder #: GS0-7F-0813N