This Espresso Machine Blind Filter is used for back flushing -automatic espresso machines that have a pressure release mechanism. It fits into the group handle in place of the standard filter. Back flushing your coffee machine helps to remove coffee residue which builds up inside the group head. Features -Color:Silver -Material:Stainless Steel -Size:6.50X6.50X1.20cm/2.55X2.55X0.47in - The Blind Filter is made of high-grade stainless steel, safe and , and can be used with confidence. - Used for backwashing of semi-automatic coffee machines with pressure release devices. - The Espresso Machine Filter Bowl is an excellent replacement for old or one, convenient to use. - With this item, you can greatly improve the function of the entire coffee machine. - The workmanship of this product is perfect, and you will have a good experience in using it. Package list: 4 x Coffee Machine Backflush Disk