Material: PU + iron sand Specifications: 1KG*1pcs, 2KG*1pcs, 3KG*1pcs, 4KG*1pcs, 5KG*1pcs, 6KG*1pcs, 7KG*1pcs, 8KG*1pcs, 9KG*1pcs, 10KG*1 pcs, 12KG*1 pcs Color: black, yellow, green, silver, gold