DURABLE MATERIAL: This mini float valve is made of high quality PVC (polyvinyl chloride) for corrosion resistance Great design: rubber washer ensures leak-proof and leak-free; adjustable arm with over 180 degree adjustment range; PVC screw for adjustable arm prevents rust and oxidation VERSATILE: Works great for water trough, humidifier, fountain, aquarium, pond, chicken/dog/horse/cattle water trough, etc. EASY TO USE AND COMPACT SIZE: 1/2" NPT male thread inlet, just hook it onto the end of a pipe. Nice solution and comfortable chair Product Description: Material: PVC (Polyvinyl Chloride) plastic Product Size: 9.5 x 2 x 2 inches per float valve Product Weight: 0.2 pounds per float valve Feature: This float valve is designed to easily screw into a 1/2" National Thread (NPT) female thread port can Same basic principle as your flush toilet - Checked fills are below the level, checked stops are below the level. It is perfect for water troughs, humidifiers, fountains, aquariums, ponds,