Specification Product Name: 4 Bearing Trolley Assembly Material: Steel Finish: Zinc Plated Steel Trolleys Size：Steel plate thickness1/4" (6mm)， Steel plate hole diameter: 9/16" (14mm)， Design load: 280 lbs at 600 rpm; 380 lbs at 300 rpm; 450 lbs at 100 rpm. Break strength: 3969 lbs. Heavy Duty Industrial Strength. The Roller trolley is suitable for: all 1-5/8" or higher pillar channels. Trolley Wheel Weight: 477g Advantage Roller Trolley Standard deep groove ball bearing installation is very smooth no noise to it when used. Bearings and pins are firmly welded, work stably, and can be used for a long time. Package included：2 pcs x 4 Wheel Trolley Assembly.
✔️【NOTICE】In order to make the trolley wheels small andstrong, all the trolley wheels on the market adopt6200 bearings,which makes the inner diameterheight of the support rod channel must begreater than 30mm.For a smooth installation ofyour trolley wheels,use"SKTREX" brand StrutChannel !You can search for ASIN"BOC1GZCZFC"
✔️【Heavy-Duty Build】Two Bearing Trolley Assembly Made with Hot-Rolled Carbon Steel of solid steel for impact resistance. Galvanized to ensure rust resistance of wheeled trolleys. Smooth and noiseless during use, bearings and pins are firmly welded, work stably, Resulting In Incredible Strength and Quality!
✔️【Trolleys Size】Steel plate hole diameter-9/16”(14mm); thickness-1/4”(6mm).For use with 1-5/8" Wide and All 1-5/8" or Taller Strut Channel.
✔️【Design load】280 lbs at 600 rpm; 380 lbs at 300 rpm; 450 lbs at 100 rpm. Break strength: 3969 lbs
✔️【Versatility】You can use it to install ceiling trolley systems or electric lifts, or use it in your DIY projects, Can use upside down.
✔️【Quality Service】If you have any issues with the trolley assembly 4 wheels then just let us know and we will solve it for you within 24 hours to ensure you are completely satisfied.