Suitable for Govt. Home Gas Cylinders ISI Marked LPG HOSE Pipe. Material: Rubber and Steel with orange hard rubber. A must essential for home gas cooking: gas Pipe is fitted on the gas Regulator to flow the gas through the cylinder without any leakage. This Pipe are made and checked under quality supervision before dispatch to consumers. According to standard regulations issued by the petroleum agencies one must change its cooking gas regulator and pipe in every 3-5 year period 'compulsorily' or there is a high risk of leakage and fire break out any time at your house.