MAJOR CONTENTS:3-Pack Replacement Charcoal Water Filter Cartridges fit Keurig Single Brewing System. Reusable Gold Tone Mesh Filter Basket and Rear Reservoir Filter Holder COMPATIBLE MODELS: Only K Duo Essentials and K Duo Brewers (not compatible with K Duo plus single serve & carafe coffee maker) ENVIRONMENTALLY FRIENDLY - This BPA-Free Reusable golden-mesh filter helps conserve natural resources and eliminates the needs for disposable coffee filters to protect environment EASY TO CLEAN - This washable filter cleans easily under running water. Dishwasher-safe ENVIRONMENTALLY FRIENDLY - This BPA-Free Reusable golden-mesh filter helps conserve natural resources and protect environment. These rigid plastic coffee filters are built to the highest standard. FULL FLAVOR - Lets the coffee flavor through for richer tasting coffee.