WESCO I-BEAM TROLLEY Rugged steel I-Beam trolley adjusts to fit the width of beams with spacer washers. Trolley features a self-aligning frame and ball bearing wheels that roll smoothly along the beam. The suspension plate allows easy hook attachments. Trolley is usable on a straight or curved track and can be installed or removed from any point on the track. Product Specifications LENGTH INCHES11-3/8 WIDTH INCHES13-1/4 CAPACITY LBS4000 COLOR FINISHOrange ASSEMBLYUnassembled BEAM WIDTH INCHES4-1/8 to 7 BRANDWesco® CONSTRUCTIONSteel HEAD ROOM INCHES5-3/4 MANUFACTURERS PART NUMBER272160 WEIGHT LBS48