Parts list (1 set): 1.5 mm OD hoses Materials:food-grade silicone, Quantity:5pcs Mainly used for feeding Newborn Baby Birds,such as less than 10 days of Melopsittacus undulatus,or less than7 days of Psittacula agapornis and so on, suitable for feeding Versailles milk powder such as fine milk powder. Very soft,don't hurt your baby birds,make your feeding work more easily. It's designed specifically for newborn birds,Perfect Care for Your Newborn Baby Birds.