S&B 8ply Power Stack Air Filter - Red Metal Cap, 4.00" Inlet, 12.00" Length, Red Element Item ID: SBPS-400-1200-RED-RED Size (spec): 4.00" Material (spec): 8-Ply Cotton-gauze Dimensions (spec): 4.00" Outlet ID x 5.25" Cone OD x 12" Filter Height (spec): 12.00"