Weights from 5mg to 1mg are Aluminum. Weights from 500mg to 50kg are Stainless Steel.
Weight Sets up to 500g include a Polycarbonate Case. Weight Sets above 500g include Wood Hinged Case with Polycarbonate Case inside for weights 500g and below. 50kg weight does not come in case.
Individual Weights up to 500mg include a Polypropylene Case. Weights from 1g to 5kg include a Polycarbonate Case. 10kg and 20kg weights include a Heavy Duty Case. 50kg weight does not include a case.