Trolleys can be made to your specifications. Supplied with 58" diameter swivel hook. Wheels are supplied with graphite bushings. Item No. Description Wheel Diameter Frame Size Frame Lenght Top of rail to top of framebar Top of rail to center of swivel Approx. Weight Capacity A B C D E F Double 7118 3-78" 38"x1-12" 10-14" 4-34" 7-78" 13 lbs. 1 oz. 1000 lbs. 7128 4-58" 38"x1-12" 11-12" 5-12" 8-38" 14 lbs. 10 oz. 1200 l