2-pole switch insert with rocker and imprint '0' and '1' W.1 gray. 2-pole switch insert with rocker and imprint - 0 - and - I - AP/UP, with mechanical coding of the rocker holder, which only allows the rocker to be plugged onto the insert in the correct position, with N 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.