The Penlon is known for Pin Indexed and Bullnosed Regulators available with 3/8" BSP or Schrader fittings: It has Multi-stage, a bullnose inlet and twin gauge. There is Bullnose regulator with 3/8" BSP outlet as already mentioned. There is Bullnose regulator with Schrader. Some are equipped with Pin Indexed O2 regulator. It is equipped with single or dual pre-set flow regulators. It has multiflow Pin Indexed or Bullnosed regulator with five preset flowrates.