These Male Iron 90 degree Elbows are used to join rural poly pipe to a Female BSP threaded item and in the process turn the piping 90 degrees.
The first size is the size of rural poly pipe the Male Iron 90 degree Elbow will connect to and the second size is the Male BSP thread on the other end, this will fit the same size Female BSP threaded item.
Example: Male Iron 90 degree Elbow 1" x 3/4" This Male Iron Elbow will connect 1" rural poly pipe to a 3/4" Female threaded item. | 
