Casematix Graded Card Storage Box Sports Trading Card Case Compatible With Up 3 Bgs 5 Psa Card Graded Sports Card Slabs - Airtight, Waterproof With Moisture And Dust ProtectionCASEMATIX graded card storage box securely holds up to 5 slabbed and graded cards. The rigid exterior protects from impacts while the padded interior protects from scratches. Foam top and bottom interior can compress to snugly hold cards in place. Case features a waterproof o ring seal that locks out air and moisture for a truly protective card carrying case. An integrated pressure release valve allows for air release when changing altitudes.