This is a replica of the blood slide box as seen in the Showtime series "Dexter."
As luck would have it, this is DEAD ON ACCURATE to the late season boxes, as it was made by the same craftsman. I'll have to dig around for the details, but long story short, the guy that made this box is the guy that provided them for the show for the fifth season.
It's a beautifully made piece, and if you are a fan of the show, you really should have one. It's one of the most iconic and consistent props seen throughout the entire series. Second only to Dexter's collection of kill tools.
It also came with a really neat evidence bag, and a COA.
If you want one, please visit the makers website here. Tell them Matt Munson sent you!