Product details:

Exaco Composter Soil Fence - Universal designed heavy duty plastic grid for underneath open compost bins to keep larger animals (rodents) out. Graf Soil Fence with a foot print smaller than 38" x 38" -specially made for the Graf compost bins but they will work with any compost bin with an open bottom measuring less than 38" x 38". Made of Polypropylene. Made in Germany (by Graf).