The 88AB2-172 is a 12-way blue legend Keypad with ABS (acrylonitrile butadiene styrene) housing and matrix output. Sealed and flange mounted, 0 to 9 legends and rear panel mounting. The graphic legend is silk-screen printed on the second surface of a clear polyester film, providing maximum legend protection. It withstands high humidity and it is resistant to scratching, marring and dulling of the surface caused by fingernails, wiping cloths and cleaning materials. It has excellent solvent resistance to water, petroleum oil, alcohols and aliphatic hydrocarbons. Use an optional gasket with the keyboard. The contact system is internally sealed by a special adhesive backed sheet that holds the domes in position on the PC board.