JET industrial-duty trolley is designed for low maintenance and trouble-free operation. Multiple spacer washers make beam flange width adjustment quick and easy. Compliance: OSHA, ANSI/ASME B30.11 and B3017 standards. Capacity (lbs.): 2,000, Flange Width (in.): 3-8, Material Type: Rugged steel side plates, Osha Approved: Yes, Adjustable: Yes, Beam Height (in.): 4-19, Works With: Wide-flange h beams, standard I beams, or curved track