The Philips Sonicare Quad Stream Nozzles offer superior cleaning with four powerful water streams for maximum coverage. Gentle on gums, these nozzles are compatible with any Philips Sonicare Power Flosser. Replace every six months for optimal performance. Features Quad Stream nozzle for effective cleaning Gentle on gums with soft rubber guide Compatible with Philips Sonicare Power Flosser Easy to attach and replace Not SpecifiedPhilips Sonicare: Leading innovation in oral healthcare with advanced technology for effective and gentle cleaning.Replace nozzles every 6 months, use with Philips Sonicare Power Flosser, follow manufacturer instructions for attachment and care.Keep out of reach of young children to prevent choking hazards.