30cc Accelerator Pump Diaphragm Return Springs, Fits: Holley Carburetor Specs: *Sold As A Pair *30cc Accelerator Pump Diaphragm Return Springs *Fits: 2300, 4150, 4160 & 4500 Series Holley Carburetors and More With 30cc Diaphragm *Also Works With Similar Style AED, Quick Fuel, Barry Grant, Street Avenger & Demon Style Carbs *Holley Part Number 20-108 *Genuine Holley Performance Parts *Parts Will Come In Bulk Style Bag Packaging