Do you have certified and slabbed coins from NGC and PCGS sitting around everywhere, maybe loosely thrown into a cardboard box? Then you need a box specially made to keep those coins secure. It doesn’t matter how much your coins are worth if you can’t maintain their condition. Keeping your slabbed coins in a box made for them is one of the easiest steps you can take to keep your collection safe. MCM offers these and other accessories for your coin collecting needs.
Slab Storage Boxes: Protecting Your NGC and PCGS Certified Coins
Certified coins in NGC or PCGS holders are already protected from handling and environmental damage by their tamper-evident encapsulation, but the slabs themselves need proper storage to prevent scratching, stacking damage, and disorganization as your collection grows. MCM carries slab storage boxes sized specifically for modern NGC and PCGS holders, available in 10-coin and 20-coin capacities. The NGC Deluxe Storage Box is one of the most popular options in the category, offering a durable hard plastic construction with individual slots that hold each slab securely upright for easy viewing and retrieval.
Note that PCGS revised its slab dimensions in 2016, so some older storage boxes sized for pre-2016 PCGS holders will not fit current PCGS coins. Check the product description for compatibility details before purchasing. For a deeper look at how different coin packaging types compare, see MCM’s guide to coin packaging: OGP, capsules, and slabs.
Coin Flips, Capsules, and Other Storage Options
Beyond slab boxes, MCM carries a range of accessories for raw and uncertified coins. Coin flips, also called 2x2s, are the most common format for storing individual raw coins affordably. Look for Mylar flips rather than PVC-based versions: PVC contains chlorides that off-gas over time and can cause irreversible green corrosion on coin surfaces. Mylar and polypropylene flips are chemically inert and safe for long-term coin storage.
Coin capsules are another popular choice, offering rigid, clear plastic protection that lets you view both sides of a coin without removing it from the holder. Most capsules are sized by coin diameter, so knowing the exact diameter of your coin is important before purchasing. For additional guidance on choosing the right storage method for your collection, see MCM’s article on the best ways to store and display your coin collection.
Frequently Asked Questions About Coin Collecting Accessories
What is the best way to store NGC and PCGS-certified coins?
The safest way to store certified coins in NGC or PCGS slabs is in a hard plastic storage box designed specifically for their dimensions. These boxes hold each slab in an individual slot, preventing slabs from sliding, stacking, or scratching against one another. MCM carries 10-coin and 20-coin slab boxes compatible with modern NGC holders and pre-2016 PCGS holders. For post-2016 PCGS coins, check the product listing for confirmed compatibility before ordering.
Are PVC coin flips safe for storing coins long-term?
No. Soft PVC flips contain chloride compounds that off-gas over time and leave a green, oily residue on coin surfaces, a process called PVC damage that is difficult or impossible to reverse without risking further harm to the coin. For long-term storage, always use Mylar or polypropylene flips, which are chemically inert and will not react with the metals in your coins. If you are unsure whether your existing flips contain PVC, the safest course is to replace them with known-safe alternatives.
Do I need different accessories for bullion coins versus certified coins?
Yes, in most cases. Certified coins in NGC or PCGS slabs are best stored in slab-specific boxes. Raw bullion coins, like Silver Eagles, Gold Buffalos, Maples, and others, are most commonly stored in coin tubes sized to their diameter, or individually in coin capsules or Mylar flips. Coin albums are a good option for smaller denomination sets and type collections where displaying the coins in order is part of the enjoyment. The right accessory depends on the coin’s size, whether it is raw or certified, and how you plan to store or display it.
Where can I learn more about protecting my coin collection?
MCM’s blog covers a range of topics useful for collectors at every level. For storage-specific guidance, the articles on the best ways to store and display your coin collection and coin packaging: OGP, capsules, and slabs, are good starting points. Both cover the tradeoffs between different storage formats in plain language and will help you make an informed decision about the right accessories for your specific collection.
