All of the premium cases in the SKB Pro line are constructed using a proprietary injection molded blend of ultra high-strength polypropylene copolymer resin, giving the case 2.8 times the strength when compared to cases of a similar class. This construction also gives the Pro Series cases outstanding resistance to UV exposer, solvents, corrosion, fungus, and impact damage. Other features of the Pro cases include a molded-in hinge, stainless steel padlock loops, patented trigger release latches, snap-down rubber over-molded cushion grip handle, and automatic ambient pressure equalization valve. Features of the SKB Pro Cases Built to military standards Padlock holes include stainless steel padlock protector clips Snap-down cushion grip handles on three sides for comfortable lifting and carrying Waterproof and dust tight design (MIL-STD 810H) Molded-in hinge for added protection Ambient pressure equalization valve (MIL-STD 810H) Resistant to UV, solvents, corrosion, fungus (MIL-STD 810H) Resistant to impact damage (MIL-STD 810H) SKB Pro Series Nimble Coyote Brown Bow Case 3I-4318-PSCB