Photo 1 of 4 Wheel Trolley Assembly Roller Trolley 2Pcs Silent M10 Bolt and Nuts for Use with 1-5/8" Wide and All 1-5/8" or Taller Strut?4Pcs?

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Photo 1 of 4 Wheel Trolley Assembly Roller Trolley 2Pcs Silent M10 Bolt and Nuts for Use with 1-5/8" Wide and All 1-5/8" or Taller Strut?4Pcs?Photo 2 of 4 Wheel Trolley Assembly Roller Trolley 2Pcs Silent M10 Bolt and Nuts for Use with 1-5/8" Wide and All 1-5/8" or Taller Strut?4Pcs?