The MSS-K24S-G from Magnasphere is a Surface Mount Contact Closed Loop with 12" Jacketed Leads. The Magnasphere MSS line of security sensors provides a solution to all of the weaknesses and flaws of the reed switch contacts. The unique Magnasphere BMS switch utilized in these devices renders the MSS products virtually unbreakable, and highly resistant to permanent contact welding and outsider magnet defeat. The MSS Series is UL, ULC listed and CE certified.