Biotin-PEG3-maleimide-500mg$685.00 Biotin-PEG3-maleimide Product Catalog # Size Price (USD) Quantity Biotin-PEG3-maleimide-500mg 271608-500MG 500 mg $685.00 - Biotin-PEG3-maleimide-500mg quantity + For more size options, please click: Biotin-PEG3-maleimide Add to cart Additional information Additional information Weight 0.0005 kg Size 500 mg