Description If you are looking for practical slotted masses set, then you must not miss our product.Made from steel material, it is safe and durable for long term to use.Suitable for laboratory, stable and practical, good performance, will bring you a good using experience. Features -Color:Silver -Material:Steel -Size:10.50X4.00X3.50cm/4.13X1.57X1.38in - These slotted masses are good classroom tool for demonstrations on force and balance. - Precisely machined for accuracy, they are necessary tool for physics experiments. - Equipped with a hanger, delicate workmanship, will give you a satisfying using experience. - The various slottedmass discs can be easily removed and placed on the hanger due to slots. - Metal materials, safe and durable, great for use when determining and comparing weights of objects.Packing list1 x slotted mass(200g)2 x slotted masses(50g)2 x slotted masses(20g)1 x slotted mass(10g)1 x box1 x hanger