My Philips vacuum that is more than 12 years old is still working fine but the head, gave up after all this time.
Called the Philips customer services. Without the serial number missing from under neath the vacuum (sticker), they could not tell me which head I should buy.
I was about to buy a new expensive vacuum, but before that decided to try my chance on Amazon.
Found this vacuum head with the same shape as the one I had, measured the diameter of the pipe, order it and few days later I had a new vacuum ready to work for many years.
Saved a lot of money thanks to Amazon!