This shiny aluminum trim is seen on the front of "classic" or "vintage" trailers, formed into a "V". It can be bent around a gentle curve. Fasten with glue & rivets. Small scratches are common & can be buffed out with rubbing compound.
It is sold in 6 foot sections.
There is a $3 OFC (over-size freight charge) for each 6' piece shipped, because the tubes are 6' long.