Features: Pink filter:Correct color deviation.Restore blue color.Suitable for submerged use. Red filter:Correct color deviation.Restore green color.Suitable for seawater shooting. Purple filter:Correct color deviation.Restore blue color.Suitable for fresh water shooting. Only for the original gopro Hero 9 Black housing case.(Note:Please make sure that your case is original.) That"s not include the camera and waterproof case,It"s the filters for you original case. Specifications: Material: optical glass Color: pink, red, purple (optional) Note: No retail package. Please allow 0-1cm error due to manual measurement. please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x Diving Filter