Red Poultry Duck Nipple Waterer Fowl Water Drinker Feeder Set of 10 Red color design attracts fowl to find them fast to use, no matter they are a day old or 5 years old. screw size is 11/32" With a 360 degree stainless steel nipple head 50 Screw in style chicken water nipples Removable lower parts allows for easy cleaning