Ultra clear, heavy-duty boxes have snug fitting semi air-tight closures. This 2-piece box holds up to 150 Standard Size cards. Square corners to help prevent damage to card corners. Stackable for easy organization and storage. Holds 150 Standard size cards up to 2-1/2' x 3-1/2' Ideal for thick cards up to 360pt thickness Ultra clear, extra strong durable construction with square corners Stackable No PVC / Acid Free