Nylon Made in USA or Imported Genuine Philips Sonicare rechargeable electric toothbrush head Compatible with snap on Philips handles: DiamondClean, Flexcare, HealthyWhite, 3 Series Gum Health, 2 Series Plaque Control, and Essence+ handles #1 Recommended power toothbrush brand by Dental Professionals. Diamond shaped bristles designed to optimize performance Exceptional cleaning for whiter teeth in just 1 week Up to 7x more plaque removal versus a manual toothbrush