This McDonnell & Miller low water cut-off with standard probe is a great addition to your HVAC system. It is designed to work with 24V voltage and has a model number of 750-MT-120. The item is brand new and has never been used, making it a great choice for those looking for a reliable and efficient low water cut-off. It is suitable for use in various industrial and business settings and is a must-have for anyone working with HVAC systems.