Bookshelf Card Holders - Holds 4" x 5" cards

4" x 5" Magnetic
Adheres to the TOP of Metal Shelves

4" x 5" Magnetic
Adheres to FRONT of Metal Shelves

4" x 5" Peel & Stick Remove & Reuse

4" x 5" Peel & Stick Aggressive

4" x 5" Velcro