Peli 1400 Panel Frame allow an interface panel to be fitted flush with the rim of the case; if you plan it right there'll be enough depth in the lid to accommodate your switches, buttons, connectors and ports.
Peli's panel frame kit provides the mounting bracket, fasteners and o-ring which will be installed beneath the panel; the o-ring seals the panel and is fundamental to keeping the case watertight, even with the lid open.
The panel frame is positioned against the rib stops already moulded into the inside of the case, and is held in place with stainless steel screws.