Guardhouse Direct Fit Round Holders are made of a virgin styrene acrylic polymer that is free of all oils and contaminants. The quality of the material ensures long term crystal clear clarity. Coin is held snugly in a sealed chamber, but the capsules are also designed so that they can be opened if needed. Interior; 39mm, Depth; 6.02mm, Exterior 44.30mm. Packed 250 pieces per box. Holds 1 oz. Silver Rounds or coins of same size.