Need to use coffee machine when using. Features:  1. 100% brand new and high quality. 2. Easy to clean. 3. Safe and non-toxic. 4. High quality rubber. 5. Need to use with coffee machine. Specification:  Condition: 100% Brand New Item Type: Blind Filter Material: Rubber Color: Black Size: Approx. 50 * 2mm / 2 * 0.08in Weight: Approx. 7g / 0.2oz Package list:  1 * Blind Filter Instructions: 1. A rubber blind pad and a coffee machine handle are provided with a strainer; 2. Put the blind piece into the tip of the coffee machine handle, and then put a spoonful of 3 to 5g coffee machine special cleaning powder or a special coffee cleaning tablet; 3. Press the brew button, run for about 10 seconds, then turn off; 4. Repeat the above operation about 5 to 6 times at intervals of 10 seconds; 5. Remove the blind film, rinse the coffee handle, and the cleaning process is complete. Features Clean Your Espresso Machine -- To get the best shot of espresso every time, your machine needs to run smoothly. PREMIUM QUALITY MATERIALS -- This blind insert with backflush disk is made with superior quality, highly durable rubber materials, being easy to clean and guaranteed to withstand the test of time. EASY TO USE -- Whether you are a professional barista or at-home coffee enthusiast, backflushing with this espresso cleaning tool is simple. EFFECTIVE CLEANING -- This cleaning accessory can be used with cleaning powder and tablets, effectively removing coffee residue build-up from the inside of the ground head. APPLICATION -- perfect for cafes, locals, restaurants, hotels or home bar!