Filter Filters Used Padded Interior,Waterproof,Locks Hard Case Remove All Filters Price $50-$100 (1) $100-$500 (2) Fit Guide Multipurpose (3) Item Materials Rigid Plastic (3) SKB Cases 3I-1813-5B-L 3i Series Mil-Std. Waterproof 5" Deep Injection Molded... $149.99 SKB Cases 3I-1209-4B-L 3i Series Military-Standard 4" Deep Waterproof Case... $89.99 SKB Cases 3I-1914-8B-C 3i Series Mil-Std. Waterproof 8" Deep Case w/ Cubed... $219.99