Factory provide exercise ball directly. You will not only get good quality poducts,but also get information of process during. Item: exercise ballMaterial: PVC (ATBC/DOP)Color: custom-madeSize:18" ,20" ,21",22",25",28",32" ect.weight: 600g till 1400g per piecePrinting: LOGO,sticker or screen printing availableImproves strength, endurance and flexibility