Please Note from serial number 60605-0001 all vented models and from serial number 60606-0001 all condenser models - Hotpoint have changed the profile of the drum and the rear seal.It has been changed from 26mm to 16mm. If you are replacing a seal on a model after the above serial numbers a 16mm seal should be used. Also note that if a model has had a NEW drum fitted and that the serial number is before the above you will need to use the 16mm seal.