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NOTE: these are only for the more recent Sonic Toothbrush Set 50000SPM.. If you have the previous 35000SPM, please order these Replacement Heads.. ◄About this toothbrush. High quality replacement brush heads (pack of 2) for your Georganics Sonic Electric Toothbrush 50000SPM. Made with DuPont 152 bristles.. • Only compatible to our Sonic Toothbrush Set 50000SPM. • Made with high-quality Dupont 152 bristles. • Certified Waterproof IPX8 and FDA, CE approved. • Replace around every 3 months. ◄Materials. Plastic Handle*, DuPont Nylon 152 Bristles*. *Recyclable.. ◄Packaging. Cardboard Box^*, Vegetable Ink^*. ^Widely Recyclable, *Compostable.. ◄Directions. Easy snap-on. To replace the head, gently pull out the old head from the toothbrush body. Insert the new head by sliding it onto the metal vibrating blade.