This is a vacuum cleaner nozzle suitable for carpets and floors. It has little ball- shaped prortusions that comb up the carpet to get the dust out better and a flat area around to create better seal on floors. It fits a pipe with 35mm external diameter. Print it lying on its working surface, as if it was vacuuming, and with supports. The balls may not come out perfectly but they don't have to be ball-shaped to work well. It sucks to smooth surfaces really strongly. The edge is thin like that on purpose, so it cleans better under objects like furniture. 18cm is the total width, the hole inside is 15cm.
not bright colors as dust shows on them