Brass hexagon body with the same male BSP threads each end, 60 degree tapered ends for solder type fittings which are not supplied - if required please order separately. Offered in sizes 1/8" BSP, 1/4" BSP, 3/8" BSP and 1/2" BSP. -- 1/8" BSP threads, small hexagonal centre section - 12mm across flats, small 3mm centre bore (that can be drilled out up to 1/4"), 17.5mm total length