... stopperModel No: sc010313Origin: chinaMaterial: 100% food-grade silicone materialTypes: bottle stopper, odorless, airproof.size: 13mm, 20mmcolor: grey, black, green, ... vacuum making vulcanization process is adopted E) automatic stopper washing production line with powerful vibrating and blewing ... functions.Service:We offer these related service to rubber stopper: Color with logo wording stamp on it. ...