Vacuum Cleaner Nozzle

I needed a longer thin nozzle for an SENCOR SVC 45BK-EUE3 model, because the original one is too short. So I decided to design a new one. The inner radius is 31-32 mm. The shape is conical.

It is possible to use only the main part which is 20 cm long or combine with the part 2 to reach 35 cm. The part 2 is designed to be stackable.