The Matthews Studio Equipment 40" x 40" Floppy Bottom Hinge is used to control natural or artificial light. Can be used to protect the camera lens from flares, control spill light from other sources, or keep light from reaching an area on the set.

This 40 x 40 floppy bottom hinge from matthews increases it's length to 80" when open, making it a 40" x 80" floppy.