The EUROLITE Barndoors Theatre 2000 bk is a separately sold lighting accessory designed for adjusting the desired light beam of a spotlight. It is manufactured from 1 mm painted metal and finished in matte black. The circular ring has an outside diameter of 255 mm and an inside diameter of 212 mm. The accessory weighs 1.35 kg and is listed as a recommended accessory in the manufacturer’s shop. No electrical components or operating controls are specified.