You are looking to buy one of Porper Card Clip - Arcane from Ellusionist - SILVER New.
The Porper Clip is considered one of the best card clips out there. Magicians across the world swear by them, including the guys who live in more humid places.
The Arcane Porper Clip will keep your cards flat, crisp and free from warping, yet let you show off that killer deck inside. And card artists and manipulators: We can't wait to see the creative ways you manipulate one of these clips.