The Pelican-Hardigg Inter-Stacking Pattern (ISP) system features a disc and wave pattern that lock cases in place, eliminating movement during transit.
Case Features: Disc Pattern bottom mates with Wave Pattern on case below Rotationally Molded Case Shell 2 Edge Casters Watertight, crush proof and dust proof Wide Comfort Grip Handles System compatible across 6 different sizes Silicone Sponge O-ring Seal Pressure Relief Valve