Durite/Smiths Oil Pressure Gauge Oil Capillary Hose T Piece 3/8 BSF Adapter. Stainless Steel adaptor has dual inlets, one for the standard oil pressure switch and one for the oil pressure gauge. The block and oil pressure switch are 3/8 BSF (standard Land Rover) the side arm is 1/8 BSP (also accepts 1/8 NPT).
