Specification Brand : Bettomshin BulletPoint1 : 【SIZE】- Wheel Diameter: 50mm/ 1.97"; Thread Diameter: 8mm/ 0.31"; Thread Length: 13mm/ 0.51"; Load: 17.5kg/ 38.58Lbs(per wheel) BulletPoint2 : 【DESIGN】- Two wheels make the force more uniform, the casters will be more stable and durable. Get smooth, quiet rolling and full swivel action BulletPoint3 : 【APPLICATION】- Perfect as a set of replacement new furniture wheels or great to give older furniture a new look and feel. Suitable for desk, cabinet, flower pot holder, locker, shelf, shoe rack and so on BulletPoint4 : 【LOAD CAPACITY】- Capacity of each caster is 17.5kg, total capacity of all 4 casters is 52.5kg (calculated by 3 casters ). Because when the floor is uneven , sometimes it will be only 3 casters bearing weight BulletPoint5 : 【PACKAGE CONTENT】- 4Pcs × Swivel Caster With Brake Color : Black ExternallyAssignedProductIdentifier : 9082551032038 ItemName : Bettomshin 2 Inch Swivel Caster Wheels 360 Degree Threaded Stem Caster Wheel with Brake, M8 x 13mm, 39lb Capacity Black Tone 4pcs ItemPackageDimensions_Height : 16.4084 centimeters ItemPackageDimensions_Length : 4.9022 centimeters ItemPackageDimensions_Width : 14.5034 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : stem-casters LoadCapacity : 52.5 kg Manufacturer : Bettomshin Material : Rubber ModelNumber : AM2700W1205CA-FBA MountingType : Stem Mount NumberOfItems : 4 PartNumber : AM2700W1205CA-FBA ProductDescription : Description: Get smooth, quiet rolling and full swivel action, all while protecting your floors. Black matte surface design is simple and stylish, wear-resistant and corrosion-resistant. Twin Wheel Design, Two wheels make the force more uniform, the casters will be more stable and durable. WHAT YOU GET: 4pcs black caster . 2inch diameter wheel with M8 x 13mm Threaded Stem for mounting. LOAD CAPACITY: Capacity of each caster is 17.5kg, total capacity of all 4 casters is 52.5kg (calculated by 3 casters ). Because when the floor is uneven , sometimes it will be only 3 casters bearing weight. NOTE: Please measure the stem size of your old casters before buying, in case of buying the wrong specification casters.Please do not overload while using them.