Gauge kit includes 1/2 NPT adapter, bulb and socket assembly, red and green bulb covers, mounting hardware, and detailed instructions for installation ATM-3432 ; Sending Unit: Mechanical ; Gauge Diameter (in.): 2 5/8 in. ; Gauge Diameter (mm):. 67mm ; Gauge Range: 120-240 degrees F ; Gauge Shape: Round This diverse series of gauges combines the classic tough Auto Meter look with over 30 years of race proven design. BIBABLYKE Upgraded Car Temperature Gauge With 50mm Diameter Blue Dial Dashboard Temp Meter For Accurate Readings Auto Meter Gauge Aazon.co: Auto Eter 3432 Sport-Cop Echanical Water Teperature Sport Comp Mechanical Temperature Gauge Mechanical movements provide accuracy and durability even in the harshest environments Autometer's 3432 120-240 Deg F Sport-Comp Mechanical water temp gauge lets you easily and quickly monitor your vehicle No electrical system required for gauge operation - compatible with every street or race vehicle Auto Meter’s race proven mechanical instruments provide trusted accuracy while being simple to install