Harrington push trolley, series: PT series, 3 ton load, fits beam flange width: 3-15/64 to 6-1/64 in, fits beam height: 24 in, 25-3/4 in minimum radius curve, 5-3/8 in wheel tread dia, steel wheel, 12 in headroom to shaft, 6-7/8 in headroom to bail. Harrington PTF2030 PT Series Push Trolley, 3 ton Load, 3-15/64 to 6-1/64 in, 24 in, 25-3/4 in, 5-3/8 in