Since we have Sprossenfenster bothered me the standard nozzle something because I had to keep the window sucker always perpendicular. This exactly 17cm wide variation (Attention've read something of 14cm, which is incorrect) is working with small / narrow windows much more pleasant. Function is otherwise the same 28 cm wide standard nozzle. The details of 10mm here in the article description refer apparently only on the width of the rubber, the specified length of 10mm is also wrong, there are 170mm. Apart from the internet I saw this useful accessory still nowhere - and I am often in hardware stores go ... ;-) Conclusion: Who has to clean small windows and the window sucker estimates basically, hereby has a very useful accessory.