For use with 3" Inlet I.D. Air Filters Click Larger Image for a dimensional drawing...Dimensions as follows: Dim A = 4.33" (11.2mm) Dim B = 3.73" (94.7mm) Dim C = 3" (76.2mm) Dim D = 3.41" (86.7mm) Dim E = 2.8" (71.3mm) Dim F = 3.2" (81.4mm)