Specification Brand : BIAXJUNY BulletPoint1 : ✔️4 Wheel unistrut trolley rolling is smooth and can be easily installed in a standard single groove, keeping it centered in the groove with good side clearance, so the bolt will not rub or get stuck in the groove. BulletPoint2 : ✔️4 Wheel trolley assembly roller: fit 1-5/8 inches wide and all 1-5/8 inches or taller strut channels,M12 Bolt in the middle, 82mm (3.3inch) in length,2 nuts are include that is better for upside down used,which can help you to achieve work easily, and bring you lots of convenience for your life.Unistrut trolley design load 320 lbs at 600 rpm;450 lbs at 300 rpm;650 lbs at 100 rpm. Break strength:5511 lbs. BulletPoint3 : ✔️Heavy-Duty Build:Unistrut trolley wheels made with hot-rolled carbon steel of solid steel for impact resistance.Galvanized to ensure rust resistance of strut trolley.Smooth and noiseless during use,bearings and pins are firmly welded,work stably,Resulting in incredible strength and quality! BulletPoint4 : ✔️Operate Steadily:Beam trolleys standard deep groove ball bearing installation,is very smooth no noise to it when used.Bearing welding positioning,to ensure the stability of the work. BulletPoint5 : ✔️If you have any issues with the 4 wheel trolley assembly roller then just let us know and we will solve it for you within 24 hours to ensure you are completely satisfied. Color : Silver ExternallyAssignedProductIdentifier1 : 198723492100 ExternallyAssignedProductIdentifier2 : 0198723492100 IncludedComponents : 4Wheel Trolley Assembly Roller ItemName : BIAXJUNY 4 Wheel Trolley Assembly Roller Trolley Silent M12 Bolt for use with 1-5/8" Wide and All 1-5/8" or Taller Strut Channel 2Pcs ItemPackageDimensions_Height : 15.1892 centimeters ItemPackageDimensions_Length : 3.9116 centimeters ItemPackageDimensions_Width : 10.0076 centimeters ItemPackageQuantity : 2 ItemTypeKeyword : beam-trolleys LoadCapacity : 770 Pounds Manufacturer : BIAXJUNY Material : Steel ModelName : Trolley Roller Wheels Limit ModelNumber : BIA112 NumberOfBoxes : 1 NumberOfItems : 2 PackageLevel : unit PartNumber : BIA103 ProductDescription : 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! Operate Steadily:Wheel trolley standard deep groove ball bearing installation, is very smooth no noise to it when used. Bearing welding positioning, to ensure the stability of the work. Unique Design: The bolt is in the fastening groove, unistrut trolley will not be blocked in the channel. Two bearing trolley assembly wheel heavy duty trolley assembly with silent wheel. Easy Operation: When using, just push the wheel into the pillar channel, you can use the cart upside down. Style: 4 wheel trolley assembly rollers two bearing (2PC) Color: Silver Material: Steel