A Arch Fender

TJDA-A Arch Fenders are single piece rubber units. The simplest
version has a plain rubber face and can be installed almost anywhere.
An optional embedded steel plate allows mounting behind pilings, or
for UHMW-PE facings (p28) or steel plates to be attached.

Arch fenders are used wherever simplicity and toughness are essential,
such as general-purpose berths and exposed sites. They are easy to
install horizontally or vertically and need little maintenance.