Specification Brand : Hemoton BulletPoint1 : Our trolleys assembly are manufactured by precision craftsmanship,The two bearing trolley assembly features a welded bearing and pin shaft to offer more stability for secure use. It uses deep groove ball bearings to make sure you can operate it smoothly without making any noise. BulletPoint2 : Double bearings design, smooth sliding. 50KG bearing ability, suitable for various door types. Special design and fine craftsmanship, the replacement for your old, broken one. BulletPoint3 : Steel plate diameter hole - 0.39(10mm),length of the plate- 2.48(63mm).Ball diameter: 0.94(24mm). BulletPoint4 : Strut trolley can be used to install ceiling trolley systems or electric lifts, or use it in your DIY projects, can use upside down. BulletPoint5 : We love our customers and are obsessed with your satisfaction. If you encounter any problems during the use, please me in time, I will serve you to ensure your 100% satisfaction! Color : Silver IncludedComponents : wheel ItemName : HEMOTON 2 Wheel Trolley Assembly Rollers Two Bearing Trolley Assembly for Use Strut Channel,Pack of 3 ItemPackageDimensions_Height : 2.6 inches ItemPackageDimensions_Length : 2.44 inches ItemPackageDimensions_Width : 0.98 inches ItemPackageQuantity : 3 ItemTypeKeyword : beam-trolleys Manufacturer : HEMOTON ModelName : RDTrolley Rollers ModelNumber : PPIHXA47NTO4O5021548DO26 PartNumber : PPIHXA47NTO4O5021548DO26 ProductDescription : Features