A grey-lidded roof box with black underside, with internal struts to hold the lid open. It also has cross bars to attach it to open bars on the roof of a car.

I have not used it for many years but it appears to still be in a reasonable condition, it has been in the garage since last used.

I don't have the documentation that came with it, so I can't give you the exact specification. I believe that it came from Halfords. Their name is certainly on the bars.

It is a curved shape so it is difficult to give its exact size, bit I'd say that it is roughly 4ft x 3ft x 1ft

Roofbox with bars (The Plantation GL5)