Specification Brand : tomvorks BulletPoint1 : [Ideal for Educational Use] Used in general and technical secondary schools for experiments and group activities. BulletPoint2 : [Hook and Ring Design] Features a hook and iron ring for versatile hanging options. BulletPoint3 : [Portable Storage] Comes with a plastic box for protection and easy portability. BulletPoint4 : [Simple Structure] The structure is simple, making it easy to operate and clean. BulletPoint5 : [sturdy Material] Not prone to , ensuring long-term use. ItemName : Metal Weight Calibration Hook Ring Lever Principle Teaching Tool 50g General Technical Secondary Schools ItemPackageDimensions_Height : 3 centimeters ItemPackageDimensions_Length : 11 centimeters ItemPackageDimensions_Width : 7 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : calibration-weights Manufacturer : Tomvorks ModelName : Tomvorkstoyz3hbsie ModelNumber : Tomvorkstoyz3hbsie NumberOfBoxes : 1 NumberOfItems : 1 PartNumber : Tomvorkstoyz3hbsie ProductDescription : [Ideal for Educational Use] Used in general and technical secondary schools for experiments and group activities. [Hook and Ring Design] Features a hook and iron ring for versatile hanging options. [Portable Storage] Comes with a plastic box for protection and easy portability. [Simple Structure] The structure is simple, making it easy to operate and clean. [sturdy Material] Not prone to , ensuring long-term use.