Tapp Collections Bingo Shutter Cards 10-pk Tapp Collections is a trademark owned and operated by Tapp Collections, Inc. Tapp Collections products are sold exclusively by Tapp Collections authorized retailers. Any trademark infringement will be reported to Amazon. 6 ply rating high quality stitched board 6.9" x 6.9" x 0.12" With Central Control Switch; Easy slide windows over numbers Clear entire card by moving free space to the left No markers or chips are needed