Amazon.com: UNISTRUT Genuine P2950-EG 4 Wheel Trolley Assembly for use with P1000, P1001, P5000, P5001, P5500, P5501 and All 1-5/8" or Taller Strut Channel : Industrial & Scientific
SKTREX Cable Trolley for Electric Hoist Cable,C Track Rail Festoon Cable Trolley System for Electric Crane and Electric Hoist for Unistrut 1-5/8" Wide and All 1-5/8" or Taller Strut Channel 2 PCS:
Amazon.com: SKTREX Trolley Roller Wheels Limit Trolley Assembly Positioning for Unistrut Strut Channel with 1-5/8" Wide and All 1-5/8" or Taller Strut Channel Pack of 2 : Industrial & Scientific