Biotin-PEG-Silane (Biotin-PEG-SIL) is available in molecular weights of 2,000, 3,400 and 5,000. This product will be bottled in 500 mg, 1 gram or 5 gram bottles, depending on the item you order. Other MW available as custom products contact our Sales Team. Shipping charges will be calculated based on the total order
