ALLOYWORKS ALLOYWORKS Aluminum Shroud Fan for Chevy/GMC C/K Series 1973-1991 This listing includethe Shroud and Two 12" electric cooling Fans!!! Material: 6061-T6 Billet Aluminum, 100% welded by TIG. Not easy to damage! No leakage! Add durable plastic fan blade 12v; Fan Size: 12"; Maximum Fan CFM: 2150 cfm; Maximum Fan RPM: 2250 rpm Performance of your vehicle; Fan shrouds are significantly lighter than standard fan shrouds. Top Attention: USA Stock&Factory Direct&Three Years Warranty