Parafilm Sealing Sheets Protect Samples from Contaminants
Self-sealing thermoplastic Parafilm Sealing Sheets quickly seal test tubes, flasks and culture media work. Sealing Sheets mold to any shape. 5-mil thick. Acid-resistant, moistureproof material is gas permeable. 4"W Rolls. Choose from 3" Core, 125'L roll or 1" Core, 250'L roll.