These are extra long to work with deeper fans but also have an extra notch compare to normal ones; this allow to either mount the fan 4 extra millimeters from the case [by skipping one notch] and therefore offering extra dampening or mounting the fan on the case and the grille outside using the same rubber mount.

NOTE on delivery: most parcels are sent by Royal Mail Second Class [unless specified differently]. Second Class [or First Class for that matter] is not a guaranteed service and with the current situation packages may take up to 13 working days. I have added a Royal Mail guaranteed next day delivery service [for Mon to Thu orders only]  and a 48 hours tracked service. If you like your item to be tracked or delivered within a specific timeframe, please choose one of these services.