I bought a set of tools on eBay for my trusty Nilfisk hoover but they send me the wrong size. However they were so cheap the postage to the UK to return them would cost more then a replacement set.
This set has an internal diameter of 35mm (which seems fairly standard).
FOC to anyone on here
https://uploads.tapatalk-cdn.com/202...3baa3dfa2e.jpg