Two 11" tall, 2.50 ID, 150# rate springs for use with the Raven Dead Hooker perches. Landrum part number W11-150. Unlike the Raven 12" supplied springs that don't allow you to lower your car you can lower it up to 1" with these and have the same improved traction due to same spring rate. Much better quality springs! Both $125 delivered. [email protected]