Inside Diameter of Inner Spring in. Valve Stem Seals Included: No. Unfortunately UPS doesn't accept PO box address. Once we see that items are on their way we will send a replacement. Valve Springs, 1200 Series Drag Race, Dual, 1.625 in.Coil Bind Height, Set of 16. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts & Accessories\Engines & Engine Parts\Valvetrain Components\Valve Guides, Springs & Parts".store" and is located in this country: US. This item can be shipped to United States.