Amazon.com: RHKING Electric Hoist Installation Roller Trolley 4 Wheel Trolley Assembly 2PCS Silent for use with 1-5/8" Wide and All 1-5/8" or Taller Strut Channel : Industrial & Scientific
Amazon.com: Trolley Assembly,Upgraded Load and Stable 4 Wheel Light Duty for Use with All 1-5/8" or Taller Strut Channel(Pack of 2) : Industrial & Scientific
Electric Hoist Installation Roller Trolley Strut Channel Trolley Can be Used for 12 Gauge or Higher Metal Strut Channel.Trolley is Made of Stainless Steel (1): Amazon.com: Industrial & Scientific
NEWHOUSE ELECTRIC 1-5/8 in. Strut Channel 4-Wheel Trolley Assembly with Eye Loop, Zinc-Plated Steel, Silver 4WELT-158 - The Home Depot
NEWHOUSE ELECTRIC 1-5/8 in. Trade Size Heavy-Duty Steel 4-Wheel Trolley Assembly with Sealed Bearings for 1-5/8 in. Strut Channel HT4W-158S - The Home Depot