Filter Filters Used Waterproof,Locks,Padded Interior Hard Case Remove All Filters Price Under $50 (1) $50-$100 (1) Fit Guide Multipurpose (2) Item Materials Rigid Plastic (2) SKB Cases 3I-0907-4B-L 3i Series Mil-Standard 4" Deep Waterproof Small Case... $49.99 SKB Cases 3I-0907-6B-C 3i Series Mil-Standard 6" Deep Waterproof Small Case... $59.99