Brand new and high quality Hexagonal Internal Thread Coupling made of brass. Thread sizes include 1/8", 1/4", 3/8", 1/2", and 3/4". Suitable for industrial or home applications such as garden hoses, kitchen hoses, hydraulic equipment, water services, and more. Features include high quality brass construction, rustproof and anti-moisture, with good durability and long service life. Applicable for water, oil, fuel, and gas.