When properly installed, Middle Atlantic's seismic floor anchor brackets bring any Seismic Certified DRK, WRK, MRK, VMRK, VRK, ERK, SC, SCQ, SCRK, SCQRK and WMRK Series enclosure to applicable Zone 4, Seismic Design Category (SDC) "D" and Seismic Use Group III Upper Floor Essential Equipment rating and have an Ip rating of 1.5. Includes four brackets.