An apparatus may include a port to receive a ranging request from a cable modem and a processor in communication with the port. The server computer directs the browser of each respondent computer with at least one survey question in which the primary image is displayed from the browser’s cache for a brief interval of time to the respondent, and the respondent answers the question with respect to the primary image. A first gripping finger is mounted to the at least one slide component so as to move therewith, and a second gripping finger is positioned so that an object may be selectively gripped and ungripped by the first and the second gripping fingers. The flexible middle seal portion allows the upper seal portion to flex from an eccentric valve stem without losing the sealing function of the sealing lip.