LumiQuest? Barndoors are designed to be used with the Pocket Bouncer, the 80-20, and the Ultrasoft. When attached to these devices with self-adhesive hook and loop tabs, the Barndoors can be adjusted to an infinite variety of positions. Application: To enable the photographer to more accurately direct light and reduce its intensity in specific areas. Dimensions: Folds flat to 4 1/2 x 8 1/4.