Excel Scientific TS2-100, ThermalSeal 2 Sealing Film, Non-Sterile 50µm Film for PCR, 100 Films/Unit - 12-172 | Genesee Scientific Excel Scientific TS2-100, ThermalSeal 2 Sealing Film, Non-Sterile 50µm Film for PCR, 100 Films/Unit - 12-172 | Genesee Scientific