Pelican Protector Cases feature cell-core construction that protects sensitive equipment from extreme conditions and Pick N Pluck foam that allows customizing for most contents. Lids feature polymer O-ring for dustproof/waterproof seal and pressure-balancing, automatic Gore-Tex purge valve. Most cases have double-throw latches that open with a light pull but boast failure threshold of nearly 400 lbs. Stainless-steel, reinforced padlock protector holes offer added security. Certified with NATO Stanag 4280 and Def-Stan 81-41 European standards for military use equivalent to MIL-SPEC certification in the U.S. Both sets of criteria subject cases to standardized endurance and quality tests that simulate extreme situations, such as resistance to vibration, high impact, and temperatures ranging from 131 for 48 hrs. to -4 for 16 hrs. Largest cases offer 14,000 cu. in. of storage. Options include TSA-approved security padlocks, multi-pocketed lid organizers, and single- and dual-level padded divider sets.