Feature: 1. Important for Calf: Colostrum is the milk secreted by cows within 72 hours after calve. For calves, high nutritional value. 2. Rich in Nutrients: The colostrum contains precious active immunoglobulin (LG6, lgA, IgM, IgE, IgD) and rich nutritional ingredients such as milk calcium, protein and a variety of trace elements 3. Practical and Convenient: Colostrum bag can effectively collect and store bovine colostrum. Screw interface, easy to use, handlift design, easy to carry. 4. Widely Used: The calf colostrum packaging bag is suitable for calf colostrum bag, sheep's milk bag, perfect for pasture. 5. Premium Material: Made of high quality plastic material, safe and non toxic, no harm to the health of young animals, very environmental protection. Specification: Item Type: Colostrum Bag Material: Plastic Use: Colostrum Collection Bag Size: Approx. 39.5x32.8cm / 15.6x12.9in . Package List: 10 x Colostrum Bag Note: Manual measurement, please allow some error.Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.