54 mm funnel: coffee accessory designed for 54 mm mobile filters. It is a barista tool for Breville Barista Express, Barista Touch, Barista Pro, Infuser, Duo Temp pro. Hands-free and automatic grinding: with a simple twist, this 54mm dosing funnel fits onto your 54mm Breville coffee filter, with ears on both sides to help the filter fit securely underneath the grinder, freeing up your hands. The espresso machine accessory has a button that slides into the chute, pressing the button automatically starts the grinder for the perfect dose. PREVENT SPILLAGE: The increased height of the WDT tool when installed allows the filter to easily hold up to 21 grams of ground coffee, preventing spillage, saving ground coffee and keeping the environment clean. Compacts Ground Coffee: This espresso dosing funnel works in conjunction with the tamper to easily help you compact ground coffee in the mobile filter, greatly reducing the mess and difficulty of loading and tamping. SAFE MATERIAL AND EASY TO CLEAN: This dosing funnel for espresso machine is made of high quality aluminium alloy, safe and harmless to your family's health. This coffee maker accessory is easy to clean, you just need to rinse it with water and then wipe it with a brush or towel.