Features: Premium high density light seal foam with adhesive backing ensures 99% light blocking efficiency for professional grade film camera maintenance and light leakage prevention. Features 2/3/4mm thick foam sheets (100x200mm), paired with smooth carbon tweezers for easy installation. Ideal for camera enthusiasts, professional photographers, and DIY repairer for 120/135 film cameras requiring reliable light seal replacements. Perfect for outdoor under direct sunlight or low light environment, safeguarding film integrity during long exposures or photography. Engineered with aging resistant materials to withstand humidity and temperature fluctuations, ensuring long durability for frequent camera backdoor resealing tasks. Specifications: Component:Sponge Size:Approx.100x200mm/3.93x7.87inch Thickness:2mm/3mm/4mm Package Includes: 1Pc Leak Proof Sponge 1Pc Tongs note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.