The 626250 can be ordered in lengths of 1, 4, 10, 20, 30, 50, or 100 m. ODO probe and cable assemblies come with an ODO sensor cap. Cables over 1 m also come with a cable management kit. The 626250 optical DO probe and cable assemblies are for the ProODO. Although the 626250 assembly will also work with the ProSolo and ProDSS meters, we recommend using the new ProDIGITAL ODO/T assembly with the ProSolo and ProDSS.