USCamera Light Seal Placement Guide | Petri 7s Custom Light seals Petri Film Cameras USCamera Light Seal Placement Guide | Petri 7s   Please Contact us for any questions you may have. Also, new light seal kits and parts are added every day. For more information on purchasing this kit, go here Top Quality kits using imported open cell foam. Do you want to make your own light seal kit? Maybe you have a special film camera accessory that requires a special size of the light seal Read More...