Check the listing for details. Mushroom Cold Water Lime Pasteurization 3oz Hydrated Calcium Hydroxide Tek. Condition: New. Listed at 9.90 USD. Cold Water Lime Pasteurization You are buying 3oz of hydrated lime (calcium hydroxide) - low in magnesium for pasteurizing mushroom substrate. Each 3oz qty can treat up to 14 gallons water. Mix lime powder in cold water at ratio of: 2 gram / 1 liter or 0.2116 oz / 1 gallon Soak straw in lime bath for 16-20hrs Drain: You want the straw to be moist - not dripping Fast shipping by US Mail from NJ. NO INTERNATIONAL SHIPPING. We will cancel and refund all International Shipping orders, thank you for your understanding. Please note that when handling/using this product it could irritate skin and eyes. Please wash your hands, wear gloves and protective eye equipment. Do not drink solution or breath it in. Seller is not responsible for how this product is used after it ships.