【Adapter Type】This water flosser nozzle is compatible with Doltz (EW0983-x). Please make sure to check your model before purchasing. 【Functions】This water flosser nozzle has functions such as removing stains from the surface of teeth, cleaning periodontal pockets, cleaning between teeth, and caring for gums. 【Advantages of the Nozzle】Made of food-grade materials, it gently cleans teeth with a soft water flow without causing damage. 【Compatible Model Numbers】EW-CDJ73-W/EW-DJ52-W/EW-DJ53-W/EW-DJ55-W/EW-DJ75-W/EW-CDJ74-W/EW-DJ54-W/EW-DJ74-W/EW-DJ73-W 【Warranty】We recommend replacing it approximately every 6 months, but the replacement time depends on the frequency of use and storage environment.