P2750-EG Trolley Assembly 4 Wheel Light Duty for Use with All 1-5/8" P1000, P1001, P5000, P5001, P5500, P5501 or Taller Strut Channel, Unistrut, Superstrut (4Pack)$$Tools

4 Wheel Trolley Assembly for channel strut,Silver Finish: Electro-Galvanized Zinc; ASTM B633, Type III Made using high strength solid steel, impact resistant and zinc galvanized to offer protection against rust and corrosion Features a solid bearing steel pin shaft in the strut channel Versatile And Multi-Purpose: Each 4 wheel trolley assembly offers 450 lbs weight support Suitable for use with SC12-2-EG, SC12-4-EG, SC14-2-EG, SC12-10-EG, P1000, P1001, P5000, P5001, P5500, P5501 and 1-5/8" Wide and All 1-5/8" or Taller Strut Channel Product SIZE: 9/16" Diameter Hole; Thickness: 1/4" (6mm)