Repacement For Holley QFT AED CCS Idle Mixture Screws With Cork Gaskets Air Fuel 1015-40 Compatible With Fits Holley Model 2300 - 4150 - 4160 - 4500 2 & 4 bbl Carburetors Air Idle Mixture Screws Screws Are Made From High Quality Metreial Also Compatible With Most AED, Quick Fuel & Demon Style Carbs Sold as 4PACK Sold With 4pack Includes Cork Factory Style Seals Screws Are Made From High Quality Material Fits 2300, 4150, 4500 & 4160 Series Holley Carburetors Also Works With Most AED, Quick Fuel & Demon Style Carbs These Parts Will Come In Bulk Style Bag Packaging