Sierra push pull switches feature solid brass construction with stainless steel springs. 3/8" Diameter mounting stem fits panels up to 1" thick. 15 amp @12VDC, 25A @24VDC.. MP39400: used to control the same circuit from two locations.. MP39600: energizes two separate circuits in the ON position.. MP39640: first pull energizes circuit 1, second pull energizes circuit 2.. MP39570, MP39580, & MP39590: first pull energizes circuit 1, second pull energizes circuits 1 & 2.. MP39610 & MP39620: first pull energizes circuit 1, second pull energizes circuits 2 & 3.