This female coupling will allow you to use your Dyson vacuum tools with your Shark vacuum. The actual outside diameter measurements of the vacuum attachments are as follows. Dyson - 34.5mm and the Shark - 35.5mm. The measurements of the solid model are slightly bigger due to material shrinkage. Printed using PLA, .3 Layer Height and 100% infill. Here is the link to the exact model vacuum that this was created for. It will likely fit many other models https://www.amazon.com/Shark-Lift-Away-Self-Cleaning-Brushroll-ZU782/dp/B07S65273Q/ref=as_li_ss_tl?dchild=1&keywords=zu782&qid=1596405219&sr=8-1&linkCode=sl1&tag=desertnatural-20&linkId=ce836bfe86c26633a63cb1e941dc3458&language=en_US