Refillable propane gas cylinders from Sievert are made of high-quality steel. The cylinders are protected against corrosion on the inside and have a protective coating on the outside. Depending on the design, the cylinders are fitted with external or internal ventilation valves and have a safety valve to protect against overpressure. Depending on the regulations in the respective countries, the gas cylinders can either be filled by the user himself or must be filled by an approved filling station. Therefore, please observe the regulations applicable in your country for filling gas cylinders. All gas bottles are delivered empty.