This item is provided by Crutchfield.com and includes free phone technical support for the life of the product. Details on how to take advantage of this service will be included with your package. Should you have any issues locating information on how to contact Crutchfield Technical Support, please contact this website's Customer Service department. Increase your space for taller gear These replacement support posts let you increase the usable space between shelves in your Pangea Audio Vulcan audio rack. The posts give you 10 inches of clearance between shelves. The four steel support tubes have a durable, scratch-resistant powder coat finish. What's in the Box: 1. Four 10" posts