Valve Spring - 1200 Series - Dual Spring - 644 lb/in Spring Rate - 1.150 in Coil Bind - 1.550 in OD - Drag Race - Set of 16. Product Line: 1200 Series Drag Race. Coil Bind Height: 1.15 in. Outside Diameter of Outer Spring: 1.55 in. Inside Diameter of Outer Spring: 1.1 in.Inside Diameter of Inner Spring: 0.788 in. Maximum Valve Lift: 0.8 in. Seat Load (LBS): 250 lbs. Seat Load At (in): 2 in. Open Load (LBS): 765 lbs. Open Load At (in): 1.2 in. We do not accept P. Please provide a physical address. Items deemed missing/or lost in transit from carrier, a claim must be filed. Note: Photos do not always represent the actual product. For kits, photo might show entire kit and listing is only for one component. If in doubt, please reach out to our customer service team.