Zekuavi 16Pack Toothbrush Replacement Heads Compatible with Phillips Sonicare Protective Diamond Expert Daily 4100 5100 6100 1100 7500 6500 Electric Toothbrush, 8White8Black

Q: Is this brush head compatible with Philips HX6632?

My model is the same as yours. You can rest assured that it is fully compatible with my controller. During use, the bristles will vibrate and can effectively clean teeth. The bristles are of medium hardness, and the overall quality of the toothbrush is also very good.

Q: How about the Philips brush heads bristles of this toothbrush heads? Does it soft or medium?

The bristles of this toothbrush head are very similar to the original brush head. It's good quality. I've been using it for a while and the bristles haven't worn out. It gave me a great cleaning experience. The bristles are medium-hard bristles that clean teeth well. It is compatible with Philip sonicare electric toothbrushes.