This listing is for a Pack of 1 1 1/4 inch BSP thread (Please note that most plumbing threads are stated in BSP (British Standard Pipe) terms which differ from actual measurements. As a general rule the actual diameter of a BSP thread is approximately 1/4 inch greater than that stated. For example, this 1 1/4 BSP thread actually measures approximately 1 1/2 inches) Swivel Plug Seal and internal grill to trap debris Solid Brass with High Quality Chrome Finish with Brass Backnut and Rubber Seal Length of thread 88mm from underside of 60mm diamater flange, Weight: 0.661386786 pounds, Manufacturer: Macdee