1/2" BSP male x 10mm COMPRESSION 3/8" INCH FITTING COPPER PIPE ADAPTER REDUCER
The BSP value refers to the internal bore of the pipe, the physical thread size will be larger than this. 10mm COMPRESSION x 1/2" BSP MALE FITTING. 10mm to 3/8" or 1/2" BSP Male pipe fitting. 1 x 10mm Compression x 3/8" Male fitting.