Stainless Steel Automatic Drinker Waterer for Sheep Pig Sow Piglet Hog (Pack of 10) Thread Connector: 1/2" NPT (American Pipe Standard) Thread diameter: 3/4 inch /19mm Total Length: approx.66mm/2.6inch Suitable for Sows, Boards, Fattner Pigs, Growers and piglets