The through-hole, top-entry (straight), fully-shrouded headers have four high walls to prevent improper mating and the intrusion of flux and other contaminants. Available in even number circuits from 8 to 40, the already RoHS compliant headers are made of glass-filled nylon 66 rated 94V-0. The posts are copper-undercoated copper alloy with reflow treated tin-plating for maximum effectiveness for deterring whisker growth. The headers are offered with and without mounting / PCB positioning bosses.