I took him to mean the heater, which uses a ceramic sponge to diffuse the heat from your torch. The one from your elev8r is to do concentrates with. I think like the porosity, etc of the two sponges is different. Similar things for different purposes.What does the filter do? I have the non glass Elev8r and they include a ceramic disc for it, for which I never really knew what it was for.