These shock absorbing boots arrived very quickly. They are nice and thick and appear to be very durable. However, the stated size of 17 inches is not accurate. These boots are 11.5 inches long when at rest. They can stretch up to 14.25 inches. So if your shock is extended more than 12 inches, they may be too short for full articulation of your shock. My shocks have a 12.5 inch extension so they should work.