Plastic, Nylon Genuine Philips Sonicare rechargeable electric toothbrush head Compatible with screw on Philips handles: Advance, Essence, Elite, CleanCare and Xtreme handles. Not compatible with Essence+ #1 Recommended power toothbrush brand by Dental Professionals Up to 2x more plaque removal versus a manual toothbrush Dentists recommend replacement every 3 months for optimal results Includes 2 standard size brush heads Subscribe & Save on genuine Philips Sonicare brush head replacements and save up to 15%.