IMPORTANT SIZING NOTE - Most plumbing products are measured using BSP thread dimensions which measure 1/4 inch larger than that stated, therefore this 1 Inch BSP thread actually measures 1 1/4 Inch in diameter. If your thread measures 1 Inch in diameter then you require the 3/4 Inch version of this product brass pipe fittings barrel nipple nipple fittings threaded nipple fitting, Weight: 0.1984160358 Pounds, Manufacturer: Primaflow