Sealing films prevent evaporation and protect samples during processing, storage, and shipment. They have superior quality film and uniform adhesive. With 2 perforated end tabs for accurate positioning. Removable end-tab backing for sealing around ends of plate. Films are packaged in zipper bags. Manufactured from 2mil polyester. 83x143mm, -80C to 120C, thermal cycling, Co2 exchange-No, Pierceable-Yes, DN/RNase free-Yes