20 Pack 2 Wheels Trolley Assembly Rollers, 2 Bearings Strut Channel Trolley Hardware, Stable Strut Roller Trolley for 1-5/8" Wide and All 1-5/8" or Taller Strut Channel (Pack of 20)

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• PREMIUM MATERIAL: Made of steel, and you don't have to worry about it deteriorating over time. Spacer - each main steel connecting bearing with a fixed size spacer to make the whole roller trolley more stable and less noise; Bearings - each custom-built bearing comes with a cover to prevent metal balls from falling out during rotation. No lubrication is required for the bearings.
• SECURE & STABLE PERFORMANCE: Two-bearing trolley assembly with welded bearing and pin shaft for greater stability for safe use, solidly welded bearing and pin, stable operation, providing reliable durability and quality amazing. The machine uses deep groove ball bearings to ensure that you can operate the machine smoothly, without making noise during use.
• VERSATILE: Applicable to all channels with 1-5/8" wide channel and all 1-5/8" channel or higher strut Channel.
• TROLLEYS SIZE: Diameter hole - 9/16"(14mm), thickness of the plate- 1/4"(6mm).
• MULTI-PURPOSE: Our 2-wheel roller trolley is suitable for different situations in our daily life. Can be used in garage winch systems, electric lift systems and ceiling trolley systems.