Auto Meter 4932 Ultra-Lite II 2-1/16" 120-240 Degree F Mechanical Water Temperature Gauge Modern white LED through-the-dial lighting provides clear visibility during nighttime use Auto Meters race proven mechanical instruments provide trusted accuracy while being simple to install No electrical system required for gauge operation - compatible with every street or race vehicle Mechanical movements provide accuracy and durability even in the harshest environments Gauge kit includes 1/2" NPT adapter, mounting hardware, and detailed instructions for installation