Non-sterile refill roll. Ideal for use under the hood; the SealMate dispenser minimizes film contamination. Each sheet is separated by an adhesive-free, perforated, color-coded red band. Designed to facilitate air and CO₂ exchange. Pore size from 10µm to 50µm. Moisture vapor transmission rate = 4,200g/m²/24hr. Easy-to-pierce with serological pipets and pipet tips for direct sample recovery.