Rotational molded ball fender from Majoni at a good price.
Available in 3 colors and 5 different sizes. (The eyes are not massive, as in the ?model Yacht Fender?). All Majoni?s fenders are produced with a special brass valve that makes inflation and deflation simple.
The pressure in the fender should ideally be 0.2 bar, use a compressor or other pump with an adapter.