Service pack - 3 pack of rotary cutting heads, manufactured by Philips.
I've used them a few times so far and there are no problems. They look a bit different to the original heads, but it's not caused any issues.
Have used the new heads 6 times and found them more uncomfortable compared to the original heads. They appear to be pulling more than cutting. Having said that final shave result is acceptable.
I received the new heads the day after I ordered them and they were the right type and the shaves that I have had since I fitted them have been top class. Thank you.
