This invention relates to maintaining a customer database in a computer telephony integrated database. This system allows the display screen to slide across tracks to any desired position along the track for more comfortable viewing of the display screen by the passengers in the motor vehicle. It is comprised of a cross-linkable polyvinyl acetate, an acid, and an ammonium salt. The refractory metals of the invention include at least tantalum, titanium, cobalt and mixtures thereof. An outer portion extends radially outwardly from the central portion and is positioned adjacent to the filter media.