This is a pair of L-3's latest and greatest M24 binocular lens cap. Designed for the L3 version of the M24 binocular, they are manufactured using Zytel--an advanced thermoplastic synthetic hard rubber designed to maintain a comfortable temperature to the touch even in the coldest weather. These lens caps will not deform under temperature extremes; thus, they are virtually moisture-proof. Because they are engineered to last the life of your binocular and because they afford the best protection against the corrosive effects of moisture, you may consider these lens caps as an excellent investment in the lifetime protection of your expensive M24 optics. These lens caps will fit the M24 with a 36mm opening. If your binocular measures 36mm at the objective lens end, these will provide a perfect fit.