This listing is for a Pack of 1 25mm water pipe fittings. These are 25mm MDPE water pipe fittings. Weight: 0.551155655 Pounds, Manufacturer: Floplast. IMPORTANT SIZING NOTE - Most plumbing products are measured using BSP thread dimensions which measure 1/4 inch larger than that stated, therefore this 3/4 Inch BSP thread actually measures 1 Inch in diameter. If your thread measures 3/4 Inch in diameter then you require the 1/2 Inch version of this product.