The YSI ProODO cable and probe includes ODO optical DO sensor and sensing cap. The ProODO can be ordered with cable lengths of 1-, 4-, 10-, 20-, 30-, 40-, 50-, 60-, or 100-meters. Cables over 1-meter also come with the 603062 cable management kit.The 626250 optical DO cables ONLY work with the YSI ProODO optical DO handheld.