Number of Ethylene Glycol Repeating Units n=44 (MW=2,000 Da) n=454 (MW=20,000 Da) Number of L-lysine Hydrochloride Repeating Units x=10 (poly-L-lysine hydrochloride, MW=1,600 Da) x=20 (poly-L-lysine hydrochloride, MW=3,300 Da) Pack Size 100 mg, $285.00 500 mg, $1,135.00 1 g, $1,820.00 Material Safety Data Sheets: mPEG2K-b-PLKC10 mPEG20K-b-PLKC20 Specification Sheets: mPEG2K-b-PLKC10 mPEG20K-b-PLKC20 Related Products: Methoxy-poly(ethylene glycol)-block-poly(L-lysine hydrochloride)