Counterweighted Rail System, 2 User Max - Fixed rail anchor with trolley - 22 ft. anchor height - 32 ft. rail width - 8 ft. offset - 3M DBI-SALA Flexiguard 8517760 8517761 - FallProtectionUSA
3M™ DBI-SALA® I-Beam Trolley Anchor 2103147, Stainless Steel, Fits 3 - 8 in Wide, 11/16 in Thick | 3M United States
3M DBI-SALA 2103143 Trolley For I-Beam For Use W/Self Retracting Lifeline (Fits Beam Flanges 3"-8" In Width Up To 11/16" Thick), Gold - Job Site Safety Equipment - Amazon.com
i-Beam trolley anchor, DBI-SALA, 3M™ | VWR
14ft. Fixed-height Box-frame fall arrest system - 14ft. anchor height - Dual 15 ft. fall arrest rails with trolley - 16 in. pneumatic wheels - 3M DBI-SALA 8530345 - iWantWorkwear