The Taylor Made Post Bumpers are great protection for pipe supported type docks. Also protects the boat from contact with the metal dock pipe and hardware at dock level. Easily slides over 1 1/2″ dock pipe and rests securely against the dock. Also molded from marine grade vinyl with an inflation valve to adjust firmness. Bumpers also measure 7″ diameter by 17″ long. The post bumpers are also manufactured by Taylor Made Products.