A heavy duty, thick walled, high temperature, fuel tolerant rubber hose ideal for the plumbing of your engines cooling system whether it be thermosyphon or pumped. Supplied in approximately 90cm or 3 foot lengths so if you need a longer run than this you will have to join it up with a coupler. It has a 31mm internal diameter and a 40mm external, that’s about 1,1/4" and 1,1/2" respectively. Suitable pipe clamps (jubilee clips) are also available from the drop down menu below.