Features: 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 PackageList: 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.