Vortex Defender Flip Cap Eyepiece Lens 41.5 - 46 mm w/ Vortex Defender Flip Cap Objective Lens 56 62-66 mm. These Rifle Scope Accessories by Vortex Optics protect your fine optics from dust debris and other elements. The Vortex Defender Rifle Scope Lens Cover has three stop positions including vertical 90 degrees to lay flat and 45 degrees. For a great lens cover that not only protects your glass but even enhances the usefulness of your favorite Vortex Rifle Scope choose the Vortex Defender Flip Cap Lens Covers. The E-10 fits all eyepieces on Vortex Rifle Scopes except the 1-inch tube Viper models VPR-M-01BDC VPR-M-04BDC and VPR-M-03BDC. Specifications for Vortex Defender Flip-Cap Lens Cover: Manufacturer: Vortex Finish: Matte Fabric/Material: Rubber Color: Black Country of Origin: USA Quantity: 1 Features of Vortex Defender Flip-Cap Lens Cover: Virtually indestructible Snap flat spring for unobstructed line of sight Package Contents: Vortex Defender Flip-Cap Lens Cover Vortex E-10-KIT6: Vortex Defender Flip Cap Eyepiece Lens 41.5 - 46 mm w/ Vortex Defender Flip Cap Objective Lens 56 (62-66 mm)