Slice imaging chamber for patch-clamp electrophysiology. Fits perfectly under an Olympus inverted microscope, but YMMV for others. Circular inlet / outlet design for constant perfusion, with an indent in the bottom for mounting a glass slide.
Note that due to poor heat transfer in plastic, this design does not work well with patch-clamp rigs that rely on a heated table (like the Luigs-Neumann rigs). Inline heated-rigs should work fine though.