【Bearing Trolley Assembly Material】 Rubber-sealed low-speed bearings - Higher-cost design allows grease maintenance with superior sealing.Material Constructed from *galvanized solid steel* with exceptional toughness, corrosion/wear resistance, and impact resistance.
Trolley top:accommodates screw heads (max 0.5"W×0.2"H). Note! If the holes on the back of the 1-5/8" high Strut Channel are too large, the screws will pass through the holes.resulting in failure to secure properly.
2 x 0.43"(11mm) mounting holes for secure fastening and flexible applications.【Click 'Visit the Fuperoo Store' above to explore our full range of trolley rollers - you'll definitely find your perfect match】