Complete with washer. This product should only be installed by a Gas Safe registered engineer. 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. This listing is for a Pack of 1 gas meter union 22mm. Weight: 0.3086471668 pounds.