Biotin-PEG4-NHS-1g$400.00 Biotin-PEG4-NHS Product Catalog # Size Price (USD) Quantity Biotin-PEG4-NHS-1g 271611-1G 1 g $400.00 - Biotin-PEG4-NHS-1g quantity + For more size options, please click: Biotin-PEG4-NHS Add to cart Additional information Additional information Weight 0.001 kg Size 1 g For Research & Development use only. Not for testing and/or use on humans.