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Methoxy-PEG-(CH2)2-NH2, Mw 20,000  
Methoxy-PEG-(CH2)2-NH2, Mw 10,000  
Methoxy-PEG-(CH2)2-NH2, Mw 30,000  [1g amber glass bottle]
Methoxy-PEG-(CH2)2-NH2, Mw 5,000  
Methoxy-PEG-(CH2)2-NH2, Mw 40,000
Methoxy-PEG-(CH2)2-NH2, Mw 2,000