Made of plastic and stainless steel, safe and reliable to use.Easy to fill & clean: Just fill them up with your favorite coffee Not only that, but they clean up quickly with warm, soapy water.Use your favorite gourmet ground coffee by filling up the Reusable filter and placing it into the K-cup Holder in your brewer.BPA/lead free, one-piece design with stainless steel high heat resistant mesh system.Save up to 70% as compared to using K-cup portion packs, brew your favorite coffee and, at the same time reduce your carbon footprint on the environment.Fits for model: Keurig k31, k40, k44, k45, k50, k60, k66, k70, k77, k100, k135, k140, b31, b40, b44, b60, b50, b66, b70, b77, b200, b140, b30, b130, b145, b150, b155, k30, k130, k145, k155, k150.Specification:Dimensions: 37x47mm/1.46x1.85inchMouth width: 52mm/2.05inchColour: as shownMaterial: plastic+metalPackage Contents:5 x Black filter elements1 x spoonOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.