mPEG12-NHS-250mg$358.00 mPEG12-NHS Product Catalog # Size Price (USD) Quantity mPEG12-NHS-250mg 281310-250MG 250 mg $358.00 - mPEG12-NHS-250mg quantity + For more size options, please click: mPEG12-NHS Add to cart Additional information Additional information Weight 0.00025 kg Size 250 mg For Research & Development use only. Not for testing and/or use on humans.