Compliance with medical research and production needs Movement secret agents, not least bit of difference, caps pressed after smooth and complete,good sealing The capper has a matte texture, fine iron forging, never deformation,to prevent rust, , easy to carry Comfortable, adjustable elastic, smooth and health, beauty smart,safe and reliable Widly used in medicine, lab, hospital and school and other our ., Weight: 1.22136093148 pounds, Manufacturer: tiyao