Monstrum Pro Series Flip-Up Scope Lens Covers

IMPORTANT: Sizing is based on the OUTSIDE diameter of your scope housing. It is NOT based the objective lens diameter of your scope - a 3-9x40mm scope will not fit with a 40mm sized lens cover. Monstrum Pro Series Scope Lens Covers help you keep your glass clean and damage free for when you need it most. Rubberized sleeves are crafted from an improved rubber formulation - designed to fit snug around your scope tube with more resiliency than ever before. Before purchase, view the measurement guide and video to ensure you select the correct fit. Measure the outside diameter of both the eyepiece and objective bell end of your scope. Select the lens cover whose range corresponds to the measured diameter. If diameter size is borderline, we recommend opting for the larger size. Spring loaded flip-up lens caps deploy with the flick of a thumb and secure tightly when not in use. Monstrum Pro Series Flip-Up Scope Lens Covers (Eyepiece | 43-48 mm oustide Diameter): Sports & Outdoors