Material: Aluminum, Stainless Steel Brand: MHW-3BOMBER Quantity: 1 Manufacturer: MHW-3BOMBER Model: 51mm, 3-ear. This bottomless portafilter is only applicable to Delonghi EC680 and EC685, and SMEG ECF 01. (Note: It is NOT applicable to DeLonghi EC9335, EC950M, EC966, and EC9115. Please confirm that it fits your coffee machine model before ordering.) Why a Bottomless Portafilter? A bottomless handle makes it easier to visualize the flow of water through the coffee grounds after espresso extraction, making it easier to observe the coffee extraction and check if it is extracted evenly. By identifying extraction flaws, you can enhance the flavor of your espresso. Premium Quality Made of high-quality full metal materials, ensuring the product's rust resistance and durability while also enhancing its beauty and making the coffee-making process more enjoyable.