Similar to our standard Nimbus frames, the Nimbus ECO features a dense plastic frame with a snap lock instead of a magnetic closure. These two features greatly reduce the cost of the frame while still providing its major benefits. All of our Nimbus frames will showcase your cherished collectible, no matter how awkward it is to frame. Items are held in place by two flexible silicone membranes which make the item appear to be "levitating" in the frame. These membranes will conform to the shape of most any item like knives, pens, coins, stamps, antique pictures, or anything else you can think of. This allows the item to be viewed from the front or back. Frame opens up by way of a magnetic flap. Once the flap is raised, the frame folds in half revealing the silicone membranes. Simply lay the item on one of the membranes, close the frame, and voila.....instant display! Frame interior measures 4" x 4" and frame exterior measures 5 1/8" x 5 1/8" x 1 1/4". Available in blue, black, or white. A truly unique way to display your treasured collectible!! If you still need some ideas, Check out these creative ways to use a Nimbus Frame!