British Standard Pipe taper thread. Please select option list for sizes available. Just go to the size window above to select the size you need from the drop down menu.Listing size is nominal pipe size - the actual thread dimension is greater than nominal size. The picture may not be the correct die size, for reference only. If you have any questions. This item is in the category "Home & Garden\Tools & Workshop Equipment\Hand Tools\Taps & Dies". The seller is "gavan-2987" and is located in this country: CN. This item can be shipped worldwide.