4 Wheel Silent Trolley Rollers for 1-5/8" Unistrut Channel with M10 Bolt
✔️【Rust-proof design】Channel Trolley body hot-dip electrogalvanized steel,Eye nut and M10 bolt are made of stainless steel. ✔️【Heavy-Duty Build】 Bearing Trolley Assembly Made with Hot-Rolled Carbon Steel of solid steel for impact resistance.