Nasco Whirl-Pak Easy-To-Close Bags. Plain style. Thickness 0.076mm. 23cm L x 15cm W. 24 ounce capacity. Transparent polyethylene bags. Gas sterilized, with documentation available. Pull tabs help prevent contamination from finger contact when opening. Write-on bags have area that accepts ballpoint pen or pencil. Bags can be frozen to any temperature; including liquid nitrogen–careful handling required after freezing. Thickness, 2.25 to 4mil. Bags should not be used at temperatures above 180°F (82°C). UOM: 500/PK.