Chemex Glass Coffee Maker Cover and 200 Count Oxygen Cleansed Bonded Square Coffee Filters Borosilicate glass cover with durable paper filters Cover keeps coffee at the proper strength by preventing evaporation Cover is suitable for use with all Chemex glass coffee makers Filters compatible with CM-6A, CM-8A, CM-10A, CM-6GH, CM-8GH, CM-10GH, CM-2, CM-3, and CM-4 Assures uniform extraction since the water filters through all the grounds on its way to the apex of the cone