Each country has its measurement and diameter of the threaded screw: 7.6mm/8mm all under M8. Please be informed again that we do not sell/carry M7 or M6, the wheels you received are confirmed M8, whether suitable on your item, you will need to check your wheel thread!! Our wheels have been verified and certainly fit for Omnide**, Ergode**, IKE*, Secretl** Standing Desk (read our customer review for confirmation).