Calor 0.75 (30) POL x POL Armoured Hose Pigtail This 30 POL x POL hose connects two propane cylinders together, typically via a tee piece as part of a twin-cylinder changeover setup, or between a cylinder and a fitting that requires a POL connection at both ends. It's part of the Calor Essentials range and features armoured protection to guard against general wear, sharp objects and vermin damage. Because both ends use a POL fitting rather than a POL-to-regulator connection, this hose is intended for cylinder-to-cylinder or cylinder-to-adaptor use rather than connecting directly to a standard regulator. It carries a 5-year warranty. Key Features & Benefits POL x POL Connection: Connects two cylinders together, typically via a tee piece in a twin-cylinder setup.