Excel Scientific F2-RL-500, FoilSeal RollMate Sealing Film, Non-Sterile Ideal for PCR and Storage, 500 Films/Unit - 12-156R | Genesee Scientific Excel Scientific F2-RL-500, FoilSeal RollMate Sealing Film, Non-Sterile Ideal for PCR and Storage, 500 Films/Unit - 12-156R | Genesee Scientific