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. 5lbs