Questions about Philips Sonicare Premium Plaque Defence

Do these heads fit https://www.galaxus.ch/de/s6/product/philips-sonicare-expertclean-7300-hx960102-elektrische-zahnbuerste-13356928?supplier=406802 ? According to the description no, but it is listed as an accessory with the toothbrush itself. Thank you for clarification.

Is this about the Philips C3 Premium Plaque Defence or the Philips G3 Gum Care? Because the title says Defence and the description says Gum Care. That confuses me :)

Do these need to be recycled/disposed of in a special place when they are finished, or can they be put in the normal household waste?

Hello:) Can anyone tell me if these attachments are compatible with the Philips Sonicare ProtectiveClean 6100? Greetings ZuPu

Does it still apply to replace the brush heads every three months? I bought a new Philips 7500, after 1.5 months the orange light comes on to replace it. When I put another C3 brush head on it, the light goes out. Does the 7500 automatically know how many times you have used a brush head?

Wow. 900 people thought they were saving 12. In reality, it's interesting that the black version costs a regular 41, where the equivalent white version is only 35.90. An excellent artificial scarcity has been created here. What a laughing stock. Or does it matter to anyone whether the brush head is white or black in the barely 5 minutes in which they are visible at all? How many people would have bought them if the white version had been reduced by less than 6 francs?