What is this called? (Edging on canopy roof)

[Nozzle]

I need to get a length of this from my local window/conservatory supplier but I don't know what it's called:

View media item 82631
It's extruded ali, it's fits over the end of cellular conservatory roofing sheets, and it's painted brown. That's about all I can say to describe it!

What is it called please?

Nozzle

 

[crank39]

Polycarbonate sheet end closer and comes in 16mm, 25mm and 35mm

 

[Nozzle]

Thanks Crank39, I appreciate your answer on this matter.

Nozzle