BRAND: fanfun Materials: ABS (the cover of massage ball) 304 grade stainless steel (ball) ABS resin (base of the massage ball),The inside of the ball is a temperature change gel that can be kept hot Easy to use and carry out:Place the cryoball into the freezer for longer than 2 hours,the cold capability of the cryoball is up to 6 hours.The totall size for the cryobal with holder is 4.06 inch in diameter,so it’s convinent to carry out with you
