Automatic Changeover Gas Regulator Kit with OPSO includes two 20" pigtails with high pressure hose to BS 3212 Type 2 or BS EN 16436-1 Class 3, assembled to BS 3212, POL connectors incorporating excess flow and non-return valves, one 1/2" M x F shut-off valve, one test point adaptor, wall mounting bracket and emergency instruction plaque.