So I just got my X7 -100 steels, but I'm not sure if they sent the correct valves. They're both K valves, but one is a XS Scuba valve with a sticker on the front that reads "2400 service pressure" (see pic below); however, the burst disk on the side has "4000" stamped on it. The second valve is a Genesis, but the burst disk is stamped "3000"(see pic below). The picture on the left is the XS Scuba valve. The one on the right is the Genesis valve.