Nasco 18-oz. Whirl-Pak Bags - Whirl-Pak Bag, 18oz. - B00736WA

Capacity is measured in fluid ounces when the bag is closed and tab is folded over three times. Volume and dimensions are approximate; bags should not be used at temperatures above 180° F (82° C). Bags can be frozen to any temperature, even liquid nitrogen temperatures down to -346° F (-210° C) - careful handling required after freezing. All bags are sterilized after manufacturing. 18 oz. (532 ml) capacity - 4-1/2" W x 9" L (11.5 x 23 cm) - 2.5 mil (.064 mm) thick - Box of 500.