Plastic Coin Slab Storage Box, 20 Slab Capacity, Compatible with NGC, PCGS, PMG Coin Holders, RED, 1pcs. Scope of Application: Compatible with NGC,PCGS, PMG and Premier certified-style coin holders, slab coin holders should be less than 2.56″ x 3.34″ x 0.4″ (Length x Width x Thickness).