Chemex Glass Coffee Maker Cover and 200 Count Bonded Unbleached Pre-Folded 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 Filter is folded into a cone shape