Important Tip: Each bingo set is guaranteed to have no duplicate cards; buying multiple sets may result in duplicates Easy and Efficient Use: Each set includes 200 unique cards with smooth sliding red windows for easy number coverage; the reset function clears all windows with a single motion by moving the center "FREE" window, ensuring the cards are easy to move and never get stuck; eliminates the need for additional markers, chips, or daubers; no mess, keeps the table neat and tidy Sturdiness: Crafted with heavy duty five-ply construction and stitched edges; these bingo cards are designed for frequent use without wearing out Size: The five-ply shutter bingo cards measure 7" L x 7" W; comfortable to hold; featuring large bold 1/2" numbers; easy to read Perfect Bingo Game: Ideal for family gatherings, travel or any game night; these bingo cards create lasting enjoyment and memorable moments with friends and family