The TVB (10") 1.9" I.D. Coilover Series Springs offer a high rate of travel and lighter in weight and as a result have more linear spring rate. They are powder coated gun metal gray. 
Every Landrum Coil Spring comes with a dyno sheet. The dyno sheet shows the dynamic rate and force output for the spring in 0.200" increments. This allows the customer to know exactly what the spring rate is and means when you change a spring, you know exactly what change is being made.