Excel Scientific RSMB-2, AeraSeal Sealing Film Rolls, Non-Sterile Rolls Only, 2 Rolls of 50 Films/Unit - 12-701 | Genesee Scientific Excel Scientific RSMB-2, AeraSeal Sealing Film Rolls, Non-Sterile Rolls Only, 2 Rolls of 50 Films/Unit - 12-701 | Genesee Scientific