Parafilm is essential for wrapping petri dishes and media bottles. It is semi-porous and allows for a minimal amount of gas exchange, while also keeping the inside contents protected from contaminants.

This listing is for 10 pre-cut strips of parafilm, which has a length of 3 rectangles. These pre-cut strips can be used in a few different ways.

1. Fold the strip in half, and wrap it tightly around a single petri dish. Good for 10 petri dishes.
2. Cut the strip to be half width, and then use each half strip on a single petri dish. Good for 20 petri dishes.