• Edgar Marcus holders are made of inert Polystyrene that will not harm coins
• Clear center window for viewing the coin and a frosted outer edge
• Unique airtight double seal provides excellent long-term protection for your collection
• Can be easily opened and reused
• 2x2 outer dimensions as they can be easily stored in a variety of  or . 
• Center opening size for Quarters - 24.3mm or .957"