Check the listing for details. Holley QFT AED CCS Large Head Stainless Thumb Idle Screw & Spring. Condition: New. Listed at 14.63 USD. Holley QFT AED CCS Large Head Stainless Thumb Idle Screw & Spring Fits Holley Model 2300-4150- 4160 2 & 4 bbl Carburetors Sold as Each (1 thumb screw & spring) Compatible with Today’s Complex FuelsCCS Kits are supplied with the highest quality components that meet or exceed original equipment specifications and all CCS kits are compatible with today’s complex fuel All returns must be pre-approved before returning. Absolutely No Refund on installed items or returned items in non-sellable condition. Buyer to pay returned shipping Cost.All Electrical items Carburetor Kits and Fuel Injection Kits will be shipped in sealed clear Package if the package is un-wrapped the item is nonreturnable. Carburetor Collectible Specialty Thanks You for Your Support!Please before leaving FeedbackIf you receive an order that does not meet your Expectations, please permit us the opportunity to fix the problem before leaving negative feedback or rating us. Keep in mind our prices are controlled by eBay rating process. We strive for perfection and welcome the opportunity to correct any issues with your order. Your satisfaction is our #1 importance.Shipping TimeMost items will be shipped Same business day if ordered before 10:00 a.m. EST. A delay in payment equals a delay in shipping. Our Pro-Series Carburetors with customer specs will be shipped within five days.CCS Performance Carburetor is a complete service seller not an Empty Wagon Seller (drop shipper). Every item you see on our websites will be in stock and complete to ship within 24 hours of payment. In order to meet the price Competitive Ecommerce market, we purchase direct from the manufacturers in bulk quantities and package some items in houseContact us.Email is the quickest way to contact us. You will receive a response within 48 hours. Please limit your questions to the products we sell.If you have purchased one of our Performance Series Carburetors a Tech Support phone number will be provided in the technical information supplied with each carburetor purchase.Let CCS make your EBay experience a Great One!