Excel Scientific TS-2X8-50, ThermalSeal MiniStrips PCR Sealing Film 50µm, Polypropylene, 200 Strips/Unit - 12-168M | Genesee Scientific Excel Scientific TS-2X8-50, ThermalSeal MiniStrips PCR Sealing Film 50µm, Polypropylene, 200 Strips/Unit - 12-168M | Genesee Scientific