This 20" black Dahon bike rack is new old stock from approximately 2007.
It has a few scuffs from being in storage for so long, but has never been used.
These days, Dahon would call this an Arclite rack.

It will work on any straight-tube 20" Dahon frame (such as the Mariner), and it should work on most Tern bicycles as well (such as the Link). I'm not certain if it would work on Dahon's curved-tube frames (such as the Mu), as I think they prefer the adjustable racks.

A set of bolts is included. Installation on any 20" Dahon will require just four bolts, which may be on your frame already. The Dahon-specific bungee cord that came with it is not included as it was no longer any good.