(2) Vortex Defender Flip Cap Eyepiece - The E-10 fits all Vortex Riflescopes except the 1-inch tube Viper model VPR-M-01BDC, VPR-M-04BDC, VPR-M-03BDC and Viper HS 4-16x44 model VHS-4305 and VHS-4304. Outside diameter: 41.5-46 mm | 1.6-1.8 inches
(1) Vortex Defender Flip Cap Objective (Model 50mm) - According to the Vortex Website, it appears this model fits all 50mm objective scopes. This is the last flip cap you will ever need! Virtually indestructible, this cap will fit snugly on nearly all Vortex Optics® and features a snap flat spring that will keep your line of sight unobstructed. Outside diameter: 55-59 mm | 2.2 - 2.3 inches
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