This 58mm bottomless (bare) handle is designed for use with Breville BES900XL, BES920XL, BES980XL, BES990BSS Double Boiler Espresso Machines. With this 58mm bottomless handle, you'll be able to see your extraction in real time and know if you're grinding and tamping correctly. Detachable design, easy and quick to disassemble, easy to use and easy to clean. Basket Not Included - This is the perfect tool if you want to improve your barista skills by using a visual aid to recognize what you're doing wrong. What is a bottomless handle and what is it used for? The bottomless handle is used as a training tool. It will give you instant feedback and the ability to see if a channeling is happening right away. Channeling is when water travels quickly through the cracks in the coffee bulb, resulting in a thinner, under-extracted espresso. When this happens, you'll often see streaks of gold pop up in the espresso; sometimes, the puck will even develop a pencil lead-sized hole where the channeling occurs. With this 58mm bare handle, you'll be able to see extraction in real time to know if you're grinding and tamping properly. This is the perfect tool if you want to improve your barista skills by using a visual aid to identify what you're doing wrong. Color: Black + Silver Material: Alloy + Plastic Specifications: Item Type: 58mm Bottomless Brew Handle Weight: 0.73 lbs Package Contents: 1 x 58mm Bottomless Handle (Basket not Included) Note: Only Compatible with Breville BES900XL, BES920XL, BES980XL , BES990BSS double boiler espresso machine. Only the above package contents are included, other products are not included. Note: Light shooting and different monitors may cause the color of the item in the picture to be slightly different from the real one. The measurement allowable error is +/-1-3cm.