Features: 1.7 PIECES SET: One 10g double hooked weight, two 20g double hooked weights, two 50g double hooked weights, two 200g double hooked weights, meet your different needs. 2.CHROME PLATED STEEL: Scientific hooked weights are made of chrome plated steel, high hardness, wear resistant and durable for long time use. 3.EASY TO MOVE: Hooked weights are easy to move and are designed with hooks on both sides for attaching extra weights. 4.APPLICATIONS: The Double hooked weight set is perfect for use as an add on or spare part to a hook and loop fit kit, ideal for general science and physics laboratory work. 5.WITH STORAGE CASE: The Hooked weight set comes with a storage case for easy storage after use without worrying about losing them. specification:Item Type: Double Hooked Weight Set Material: Chrome Plated Steel Use: For General Science and Physics Laboratory Work PackageList: 1 x 10g Double Hook Weight 2 x 20g Double Hook Weight 2 x 50g Double Hook Weight 2 x 200g Double Hook Weight 1 x Storage Box