Accelerator Pump Nozzle Check Needles, Fits: Holley Carburetor Specs: *Sold as a 2 Pack *Standard Size Factory Replacement Needles *Fits: 2300, 4150, 4160 & 4500 Series Holley Carburetors and More !! *Also Works With Similar Style AED, Quick Fuel, Barry Grant, Street Avenger & Demon Style Carbs *Part Number: 121-5 *These parts are Genuine Holley Parts *Parts Will Come In Bulk Style Bag Packaging