The dock bumbpers sold at most boat stores are toy junk compared to these bumpers. The left four are about 4" diameter. I have no relation to the company but have used them for a long time in less than prefect conditions and they really work but few people seem to know about them. The shapes are to mount to poles, flat surfaces, 2X4s or square dock edges.
So if you are tired of trying to tie a fender to a round pole or tired of having fenders miss the dock with the tide look at these bumpers.
http://www.decks-docks.com/dock-bumpers.html
So if you are tired of trying to tie a fender to a round pole or tired of having fenders miss the dock with the tide look at these bumpers.
http://www.decks-docks.com/dock-bumpers.html