Excel Scientific RRTS-79X65, ThermalSeal RTS Sealing Film, Roll-Seal Up to 540 Films/Roll, 1 Roll/Unit - 12-537HT | Genesee Scientific Excel Scientific RRTS-79X65, ThermalSeal RTS Sealing Film, Roll-Seal Up to 540 Films/Roll, 1 Roll/Unit - 12-537HT | Genesee Scientific