Q:   What are the "Expander Legs"?
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The "Expander Legs"  are push-on legs that attach to the bottom of the "Sani-Moat Ant Barrier II", the latest version of the product. 

Use the "Sani-Moat Ant Barrier II with Expander Legs" for Trays, Platters, Bulk Food Containers, Planters, Trash cans and other large Food Holders.