Vortex Defender Eyepiece Flip Cap E10
The Vortex Defender Flip Cap Eyepiece will fit snugly on nearly all Vortex Optics and features a snap flat spring that will keep your line of sight unobstructed. The E-10 fits all Vortex Riflescopes except the 1-inch tube Viper model VPR-M-01BDC VPR-M-04BDC and VPR-M-03BDC.
Product Specifications for the Vortex Defender Eyepiece Flip Cap
Outside diameter: 41.5-46 mm | 1.6-1.8 inches