Support your boat cover to prevent water or debris pockets. Constructed from durable ABS PVC or aluminum. ABS PVC model is adjustable from 12 to 54 H. Can be used to support any area of the cover. One of the best cover support poles we have ever used. Very quick and easy to use. The aluminum model adjusts from 36 to 64 H. Per each. Available: ABS PVC, Aluminum. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Boat Cover Parts.