30B Series 3/7000/4000 Series Foil and Cutter cartridge. Replacement parts for Braun’s Series 3 & 7000/4000 Series models. To maintain optimal shaving performance you should clean the shaving parts regularly with Braun cleaning agents and consider replacing the foil and cutter block every 18 months. Would apply to model SyncroPro, Syncro, SmartControl, & Tri Control.
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