Product size: Shroud Fan Overall Size(inch): 24 x 17.15 x 3.75 / Fan Diameter (inch): 16 / Thickness (inch): 2.5 Compatible with :For 1955-1957 Chevy Bel Air / 1957 Chevy Del Ray / 1955-1967 Chevy One-Fifty Series and Two-Ten Series 3.8L 3.9L L6 4.3L 4.6L V8 GAS Easy to install: Built to superior OE standards for a precise fit, direct bolt-on replacement. No Drilling or Modifications Needed for Installation Product advantage: Made of High Quality Full AA5052 Aluminum Construction;Stronger and Higher Capacity for Coolant than Stock Units, Light-Weight Racing Design，Improves Cooling by 35% to 45% Temperature Excellent Service:Professional Installer is Highly Recommended; No Instruction Included! If you have any questions,We will answer your questions 24 hours a day Package Include: 1 X AA5052 Aluminum Shroud 1 X 16” Fans (Includes mounting kits) 1 X Thermostat Relay Kit Fan Details: 16inch Fan Voltage: DC 12 Volts Maximum Fan CFM: 2150 cfm Wattage: 120 Wattage Thickness (in): 2.500 Number of Blades: 10 S-Type blades Maximum Fan RPM: 2,250 rpm Amp Draw: 10 amps Includes the Mounting Tabs for an Easy Zip Tie Installation Thermostat Kit: Universal fit for any automotive vehicle and electric fan Activates by grounding electric fans at preset temperature 180'F turn-on temperature, 165'F turn-off temperature 3/8" NPT thread-in brass probe w/ 1/2" NPT adapter included Probe typically threads into radiator, water outlet or manifold Compatible with: For Chevy Bel Air/Nomad/Del Ray V8 Engine 1955 1956 1957