PRODUCT DESCRIPTION Incision 80mm Scale Shock Spring Set Includes soft, medium, and hard spring rates to allow for tuning options on your Incision 90mm Scale Shocks. Soft Spring Rate: 2.27in/lb Medium Spring Rate: 3.10in/lb Firm Spring Rate: 4.61in/lb Fits IRC00215 Incision 80mm Scale Shocks Included with VPS09005 and VPS09006 VS4-10 Ultra Kit