rubber medicine ball, rubber weight ball, rubber solid ball, bouncing medicine ball, heavy rubber ball Rubber medicine ball feature1) Material: all rubber of high quality2) Official size and weight3) 1kg, 2kg, 3kg, 4kg, 5kg, 6kg, 7kg, 8kg, 9kg, 10kg4) 2lb, 4lb, 6lb, 8lb, 10lb. 12lb, 15lb, 18lb, 20lb5) 100% for export6) Better price7) Non-slip surface8) Safe, healthy and convenient to carry.. ...