4 Wheel Silent Trolley Assembly Rollers Four Bearing Trolley Assembly for 1-5/8" Wide and All 1-5/8" or Taller Unistrut Strut Channel with M10 Bolt and Lifting Eye Nuts. ✔️【Rust-proof design】Channel Trolley body hot-dip electrogalvanized steel,Eye nut and M10 bolt are made of stainless steel.
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