Used UFO cowl (Ultimate Flue Outlet).

Fits 6”-10” diameter chimney pots.

No mesh in this one.

The stainless straps secure the cowl to the pot and the red ones are bent inside the pot to centralise it.

See link for instructions (which are for the mk2 cowl but they are very similar)

https://brewercowls.co.uk/media/productattachment/u/f/ufo_il_270916.pdf

This is a used item so it may have dents, scratches, bird poo, cobwebs, soot staining, flaking paint, but will still be suitable for reuse.

Supplied with a fixing strap.