Series button insert with 2-way rocker, 2 NO contacts, common input terminal W.1, polar white. Series button insert, 2 NO contacts with 2-way rocker AP/UP, common input terminal, with plug-in terminals, inserts only achieve protection class IP55 when mounted with an AP housing or frame for UP mounting from the W.1 product line. Surface-mounted installation. Material: plastic, thermoplastic, impact-resistant.