Refuelling coupler for 3" hose connection outer (vent line) and 38mm inner (fuel line) Inner/Outer hose connection.This is an OLD version and we highly recommend you utilise the latest RFC-89 versions, however if you would like to use the inner and outer hose connection to match your old system WE CAN HELP with supply of this particular part.NOTE: the RFC-88 and RFC-89 versions do interchange between the coupler and the "Car side" nipple.This product is a spare part for the Krontec Refuelling RFC System.If ordering this is item it is a special order and as such cannot be returned for credit or cancelled once order is placed.