8 Wheel Bearing Trolley Rollers, Allowing The use of a 1-5/8″ High Strut Channel
Hoist Roller Trolley leaves a 7mm space at the top, the fixing screw can be installed inside the strut channel and will not affect the trolley sliding back and forth. Trolley assembly for use With P1000, P1001, P5000, P5001, P5500, P5501 and All 1-5/8″ or Taller Strut Channel.
8 Wheel Trolley Assembly Roller Bearing For 1 5/8 Inch Strut Channel Hardware
Roller Trolley Has a Height of 7mm(0.2756in) in the Center Space, so You can Choose a set Screw of 7mm(0.2756in) or Less When Installing the Strut Channel, Which Will not Obstruct the Back and Forth Sliding of the Trolley.