Compatible with Contax and compatible with Yashica mount manual focus lenses. Keeps dust, dirt, and moisture out of your lens, helping maintain optical quality. The item has an inner diameter of 48 mm, an outer diameter of 52 mm, and a height of 14 mm. Made from durable and high-quality materials to ensure long-lasting use. Product include a total of 4pcs camera rear lens cap, which can completely meet your daily use needs and replacement.