Description Specs • Rear Lens cap for Pentax K-Mount lenses, protects the rear element and mount of the Lens • Enhanced craftsmanship and high-tolerance construction for demanding professionals • Precise fit and solid connection; no play, gap or wiggling when mounted on lens or adapter • Premium Grade, High Impact Plastic • Limited 2-Year Manufacturer Warranty The Fotodiox Rear Lens Cap is a spare or replacement cap specifically made for all Pentax K-Mount Lenses and Adapters. The plastic cap protects the rear element and mount of the lens or adapter against scratches, moisture, dust, and fingerprints when the lens or adapter is not attached to the camera. The cap attaches securely by simply twisting onto the lens or adapter. Lens Mount Pentax K-Mount Rear Lens Mount Materials Premium Grade, High Impact Plastic Product Dimensions 2.6 x 2.6 x 0.5 in (6.5 x 6.5 x 1.2 cm)0.03 lb (0.5 oz) Shipping Dimensions 4 x 8 in (Small Mailer)0.2 lb (3 oz) Manufacturer Fotodiox Inc. Warranty 24 Months All pictures are for illustration purposes only. Actual product may vary slightly due to ongoing improvements in design.