3.0" (76mm) Honeycomb Air Stabilizer Screen in .25 (6mm) open cell Performance MRP mass air flow screens are typically used as an upgrade to mass air flow housings or intake systems. Air flow straightener screens can dramatically improve MAF sensor readings, throttle response, and aid in engine idle stabilization. Easily trimmed with sharp scissors to adjust fit. Made in USA Features: Cell Size: 1/4" (6 mm) or 3/16” (5 mm) cell size Cell Material: 5052 aluminum alloy foil Outside Diameter: Comes in a range of diameters from 2.5" to 5.0" Thickness: 1/2" thick A product of Performance MRP.