Compatibility: This 77mm metal ring adapter is compatible with Cokin P-series filter holders. This adapter is also compatible with UKCE brand lenses. It can be raised or lowered to 77mm, allowing you to easily attach your lens to capture the perfect moment. Easy to install: Direct replacement without adjustment, perfect compatibility, and high reliability. Product material: This product is specially designed and made of aluminum, ensuring a long service life and resisting damage. Product include a total of 2pcs Filter Adapter Ring, which can completely meet your daily use needs and replacement.