The Gaslow Stainless Steel Hose connects to any Gaslow refillable bottle and goes from your bottle to connect to your motorhome/caravan regulator. Unlike rubber hoses shttp://www.automateuk.com/index.php/admin/catalog_product/edit/id/340/key/b860a46e03c77e96169741921fc09001/#tainless steel hoses won’t leave a plasticiser residue therefore not contaminating your regulator. Hoses should be changed at least every 20 years and are made to standard EN0380. They fit into the inlet of every 30 mbar caravan/motorhome regulator including Gaslow changeover systems using the W20 connection. The hose will connect to any of the following: 4.5 kg Butane, Gaslow refillable, French screw on cylinders and all adapters for any other cylinders.