Butyl Bubber Stopper 20-B2 1.GMP,ISO9000 quality system 2.Packed in clean room (Class-100) 3.best compatibility with medicine Features:1) Specifications: 13mm,20mm,24mm,26mm,28mm,30mm,32mm,34mm,etc.2) Material: bromo-butyl and chloro-butyl rubber.3) Color: grey,red,black,green,etc.4) Cetificate:GMP, ISO systerm; test as YBB000420025) Packed in clean room (Class-100). ♥Designed as per GMP ...