60608: This top was designed for commercial service. Tube size and fastening systems were taken into account. The top measures 60 inches by 86 inches long and consists of a laced acrylic fabric over aluminum bows. Flat aluminum plates are located under the canvas for antennas, strobes, sirens, etc. An aerodynamic fiberglass box is attached under the top for flush mounting radios, etc. Top is suitable for mounting up to 75 pounds of equipment. Included with the T-top package are heavy-duty console floor cleats. Consult factory for crating and shipping details. For center console boats 18' and larger. 60609: Same size and configuration as the medium-duty unit, but with heavier tubing, fiberglass radio box enclosure, acrylic fabric and heavily reinforced floor and hull structure. Supports up to 150 pounds. Factory installed only. For center console boats 21' and larger. (medium-duty)