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D622103143 / 2103143 TROLLEY BEAM FITS 3" TO 8" UP TO Adjustable Width Trolley for I-Beam Designed for use with self-retracting lifelines on horizontal I-beams, the Adjustable Width Trolley is attached at the midpoint and has a minimum turn radius of 7". It fits flange widths 3" to 8" and up to 11/16" thick flat or tapered beams. Non-corrosive double-shielded wheel bearings keep the trolley moving smoothly..
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