Fangrui Product Details [bottomless Portafilter Contains Filter Basket And Dosing Ring]54mm Bottomless Portafilter Is Designed To Work For And Sage Series, Which Contains Bes880, Bes878, Bes870, Bes840, Bes810, Bes500, Express, , For Pro, Infuser, Duo Temp Pro. Fine Hole Design, Evenly Filter The Coffee Powder, Light To Use. With The Coffee Dosing Funnel, All The Coffee Goes Into The Filter Basket, Reducing Mess [ergonomic And Movable Design]wooden Handle With Ergonomic Design, Making The Grip More Comfortable And Stable Operation. Removable Design, Disassembly, And Assembly Are Convenient And Quick. The Slope Of The Stainless Steel Design Allows The Handle To Be Placed More Smoothly And Does Not Tilt To The Sides. We Do Not Recommend Washing In The Dishwasher, The High Temperature Discolor The Handle [coffee Masters Training Partner] The Bottomless Filter Allows You To Find And Correct Extraction Problems, Whether Your Grind Is Wrong Or Your Mash Is Incorrect, The Bottomless Filter Let You Know. This Is A Great Tool For Beginn