SKB 3I-1711-XLX iSeries Injection Molded Case with Foam for Shure SLX/ULX Wireless Mic System Ultra high-strength polypropylene copolymer resin UV, solvent, corrosion and fungus resistant (MIL-STD-810F) Complete gasket seal makes these cases absolutely watertight (MIL-STD-C-4150J) Designed to hold Shure SLX and ULX wireless systems Patent pending "trigger release" latch system