made with cast iron, and good quanlity,colorful rubber dumbbell material:cast iron Process technique:RUBBER Available Weights: 2KG,3KG,4KG,5KG,6KG,7KG,8KG,9KG,10KG PACKING:1pcs / Polybag 1pcs / 1ctnabout 1000kgs /case 20'GP:22000kgs RB-109 12 side rubber dumbbell