fuperoo 8 wheel trolley assembly rollers.eight bearing trolley assembly.the top of the trolley has room for set screws, allowing the use of a 1-5/8" high strut channelor higher metal strut channel. c-8wheel trolley 4pcs is up for auction in Tools & Home Improvement. The current bid is $1.00, 98% below the $59.99 MSRP, in New/Like New condition. This auction has ended — similar items appear in live auctions regularly.