Carcoon Evo Airchamber. The base is 460cm x 175cm, so ideal size for an Elise or other small sports car, but not wide enough for an Evora. It has sat unused in my attic for the last 10 years but is in good working order (the photo was taken today). The outer foam filter covers could do with being replaced - these are available as service items from Carcoon.
It rather bulky to post so better I'd prefer if a buyer can collect from West Linton or Edinburgh. A great deal at £100 for an SEer.