Serious coin collectors, listen up - these MUDOR coin capsules are exactly what you need to protect your valuable coins! Each capsule measures 25mm x 2.3mm inside, making them perfect for quarters and other coins under 25mm in diameter. The high-transparency plastic lets you admire both sides of your coins without any distortion, and the excellent sealing keeps out dust and moisture that can cause oxidation. You get 100 capsules plus a handy plastic storage case that keeps everything organized and portable. The quality is impressive - they're made from premium plastic (no PVC that can damage coins over time) and snap together securely without being impossible to open. I've used them for everything from state quarters to foreign coins, and they've kept my collection in pristine condition. The storage case is sturdy enough to toss in a bag without worrying about damage. Whether you're a beginner starting your first collection or a seasoned numismatist needing reliable protection, these capsules deliver professional-grade protection without the crazy prices you see from some specialty suppliers. They've completely transformed how I store and display my collection - no more worrying about fingerprints or environmental damage!