3M Scotch 311DC Heavy Duty 1-Inch Mounting Squares – Link

This is currently marked down on Amazon to $2.97.

Note that this is an Add-on Item which ships with a $25 Amazon order.

• Made in USA
• Double-coated 1-inch foam squares
• Adhere and conform to a variety of surfaces
• Ideal for mounting pictures and decorations on most types of walls
• Permanently bonds to most surfaces
• Squares hold up to 2 pounds