Case body moulded in high-impact ABS, also popular ABS available. Better airtight ,water proof and Anti-corrosion performance ;protect your instrument even under the adverse environment.Custom the free compartment very convenient because of the foam pre-cut grip. Have a knob with o-ring for manual pressure adjustment.Latch of change is a single plastic component, It won't get lost even under higher impact.Have a recessed area for a label in the top of cover and in the bottom of body. With a bezel kit available, the bezel kit must be ordered separately.