Here we have for sale a brand new CTC Dellorto PHBL26BS rear carb adaptor trumpet.
These have been made to replace the flimsy rubber trumpets fitted on many modern and classic bikes, when tightening the airbox to carb rubber onto the original rubber trumpets they very often move and do not seal properly, these stop that from happening.
These have been designed to fit tightly over the back of the carburettor and have an O ring seal and three grub screws to secure it into place and seal the carb off from the elements, being made from aluminium you can properly tighten the rubber hose onto it with no fear of the trumpet flexing and leaking.