MCA-C800-PC; 20 mm x 20 mm microporous film chip with hexagonally arranged U /round-bottom microcavities/ wells arranged in a 10 mm x 10 mm array; based on proprietary 3D ion track etching technology; ~750 μm inner microwell diameter; < 25 μm bottom thickness; ~1–3 μm average pore diameter; polycarbonate (PC)