Specification Brand : BIAXJUNY BulletPoint1 : Heavy-Duty Build: Trolley Assembly made with hot-rolled carbon steel of solid steel for impact resistance.Galvanized to ensure rust resistance of strut trolley.work stably,Resulting in incredible strength and quality! BulletPoint2 : Unistrut Trolley Suitable for:fit 1-5/8 inches wide and all 1-5/8 inches or taller strut channels, which can help you to achieve work easily, and bring you lots of convenience for your life. BulletPoint3 : Unique design: The bolt is in the fastening groove, trolley will not be blocked in the channel. 4 Wheel Heavy Duty Trolley Assembly With Silent Wheel. BulletPoint4 : Versatile: Our 4-wheel roller trolley is suitable for various applications in daily life, including garage winch systems, electric lift systems, and ceiling trolley systems. BulletPoint5 : Design load:Unistrut trolley design load 320 lbs at 600 rpm;450 lbs at 300 rpm;650 lbs at 100 rpm.Break strength: 5511 lbs. Color : Silver IncludedComponents : 4Wheel Trolley Assembly Roller ItemName : BIAXJUNY 4 Wheel Trolley Assembly Roller,Silent Unistrut Trolley Roller Galvanized Steel with M12 Bolt and Lifting Eye Nuts for Use with 1-5/8" Wide and All1-5/8"Ortaller Strut Channel(2PC) ItemPackageDimensions_Height : 14.9098 centimeters ItemPackageDimensions_Length : 4.191 centimeters ItemPackageDimensions_Width : 9.906 centimeters ItemTypeKeyword : beam-trolleys LoadCapacity : 770 Pounds Manufacturer : BIAXJUNY Material : Galvanized Steel ModelName : Beam Trolleys ModelNumber : BIA132 NumberOfBoxes : 1 NumberOfItems : 2 PartNumber : BIA133 ProductDescription : Easy Operation: When using, just push the wheel into the pillar channel, you can use the cart upside down. Style:4 Wheel Trolley Assembly Roller Stainless Steel with M12 Bolt and Lifting Eye Nuts Material:Galvanized Steel Color: Silver Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing.