4.67" x 0.138", 0.17" Dia Mounting Hole, Mill, Aluminum, Fan Filter Fan Filter Type Filter Used On 4-1/2 Inch Fan RoHS Compliant Size 4.67 Inch Height x 0.138 Inch Thickness Mounting Hole Diameter 0.17 Inch Mounting Hole Center 4.13 Inch Finish Mill...