�Periodontal Tips】A soft rubber tip designed for gentle, low-pressure delivery of therapeutic rinses below the gumline.To alleviate the symptoms of gingivitis, periodontitis, periodontal pocket depth reduction. �Work with models】Only compatible with COSLUS Water dental flosser F5020E F5029A,not for use with Waterpik or other brands. �Scheduled Repalcing for Health】 We recommend replacing your Tips every 3 months because mineral deposits can collect and reduce performance over time. �Set of 4pcs】4 pieces tips for general use, good replacement for the original one. �Customer Support】FUNSEE support team is available to help with any product questions or needs. Please Note: Only for COSLUS Water Dental Flosser.