Product details:

Self-standing with support plates on the top and bottom Bottom support plate also has a foam pad to prevent sliding and protect the boat. Adjusts heights easily from 30 to 50 in 2.5 increments to accommodate different styles of boats. The nylon strap assembly is 50-ft long and fits most boats up to 22 feet in length. It is easy to install and stores compactly when not in use. Camco also makes a full line of attachments that can be purchased and used with the telescoping support pole.