Tezla Caravan Home - 21 mm Clip On Adapter with Gas Pigtail - 500 mm length High pressure black hose to (and marked) EN 16436-1 Class 3. 6.3mm i.d., 16.3mm o.d., 30 bar working pressure, 90 bar burst pressure. A self adhesive advisory label is attached to every hose. The pigtail hose is high quality made in the EU unlike a lot of pigtails on Ebay made in China and India 21mm Butane Gas Clip On Adaptor Suitable for the following gas cylinders. 21mm - 7kg & 15kg Calor/Flo-Gas cylinders Pigtail Manufacturer - Cavanga Clip On Manufacturer - iGT Instruction leaflet enclosed