Polyethylene glycol(PEG) 20000 Average molecular weight: 12000-20000 PEG200,300,400,4000,6000,8000,20000 Polyethylene glycol(PEG) 20000Average molecular weight: 12000-20000PEG200,300,400,4000,6000 ... -001Tel: 0086-551-4846007(Ms. Fang)Fax: 0086-551-4846082 Polyethylene glycol(PEG) 20000