267021 Sheets and plates of polarising material/ lenses, prisms, mirrors and other optical elements (except of glass not optically worked), whether or not mounted, other than for cameras, projectors or photographic enlargers or reducers

26702153 Prisms, mirrors and other optical elements, n.e.c. 26702155 Mounted lenses, prisms, mirrors, etc, of any material, n.e.c. 26702170 Mounted objective lenses of any material (excluding for cameras, projectors or photographic enlargers or reducers) 26702180 Unmounted sheets and plates of polarising material/ mounted filters of any material