The Gaslow R67 11kg Refillable Cylinder 2 is especially designed to meet the French R67 Gas Tank Standards. Gaslow have always held the view that the Gaslow Bottles are considered as "Cylinders" and therefore they are manfacturered to the cylinder standard EN1442:2006. Gaslow were not just alone as the UK LPGA also believed the same. The French however, believe that refillables should be classified as tanks and that we should produce to the tank standard R67. This regulation applies to specific equipment of vehicles of category M and N1 using liquefied petroleum gases in their propulsion system. For complete safety, the European Pi approved filler valves automatically shut off the gas when 80% capacity is reached - preventing dangerous overfilling. ?Multivalve with improved, mechanically accurate contents gauge. ?Excess flow valve prevents full flow of gas if the hose ruptures. ?Internal filter. ?Over pressure safety device. ?10 year warranty (specified by the R67 standard). ?11kg size tested and approved to R67 standard.