Arken Flip Its Flip Covers - 56mm ObjectiveArken: Flip Its Complete Set: Both Ocular and Objective Product Details Protect your glass, with a quick flip. Made from durable materials that can go where you go, our snug fit and 270 deg of rotation allow you to keep the focus where it needs to be. Ocular Size: 37 42mm OD Objective Size: 60 65mm OD Fits: EP5 Most other brands with 56mm Objective