Eyecup for POSP - is installed on POSP, PSO eyepieces and other optical sights with a diameter of 38 mm, while the rubber has excellent stretch and allows the product to be mounted on larger eyepieces. Peculiarities: When aiming, it allows you to bring your eye almost close to the optics without distorting the image, since the distance from the pupil to the eyepiece necessary for correct operation will be maintained; The eyecup for the POSP protects the shooter's eye from injury when shooting from large-caliber weapons with strong recoil. Characteristics: Dimensions (Length x Diameter, cm) - 9x5.1; Weight, g - 18; Material - rubber.