Filtropa Filter Papers are designed to fit flat bottomed automatic filter machines, as well as manual drippers such as the Clever Dripper. Filtropa filters are environmentally friendly, produced without the use of any glues or chemicals. Range: Filtropa Material: paper Size: 4 Dimensions: 190mm top corner to corner Quantity: 1x100 Lifespan: single use Fits: Bonavita size 4 drippers, Bonavita brewers, Clever Coffee Dripper Brews: 1 cup