DURABLE MATERIAL: This mini float valve is made of high quality PVC (polyvinyl chloride) for corrosion resistance GREAT DESIGN: Rubber washer ensures a leak-proof and leak-free kit; Adjustable arm with over 180 degrees of adjustment range; PVC screw for adjustable arm prevents rust and oxidation VERSATILE: Works great for waterer, humidifier, fountain, aquarium, pond, chicken/dog/horse/cattle waterer, etc. EASY TO USE & COMPACT SIZE: 1/2" NPT male threaded inlet, just hook it onto the end of a hose. Nice and lazy solution Product Description: Material: PVC (Polyvinyl Chloride) Plastic Product Size: 9.5 x 2 x 2 inches per float valve Product Weight: 0.2 lbs per float valve Feature: This float valve is designed to screw in Easily into a 1/2" female National Pipe Thread (NPT) fitting Same basic principle as your flush toilet - fills when below the level, stops when at the level. It is perfect for water trough, humidifier, fountain, aquarium, pond, livestock water tanks, etc., saving you