Costyle Yellow Night Vision Retro Polarized Clip-on Flip-up Plastic Sunglasses for Driving Traveling Yellow night vision glasses. New design leg profile to fit both metal and plastic frames. The size of the clip on: Total length: 138mm, Total Height: 50mm, Length of each len: 61mm, Space between of 2 lens: 11mm. Please make sure if the clip is suitable to your glasses! Improve your vision, reduce glare, and sharpen your eye sight at night with these clip on night vision lenses. Notice: About the glare reducing, the dark clips on may make you feel better. If you want a better feeling effect during daytime using, we suggest that you should purchase the dark ones(such as black or blue) in our store. Soft rubber Legs have proprietary coating to protect ophthalmic lenses and prevent shifting and scratching. Convenient one hand application to Prescription frames with positive indexing lens positions. Warranty: 12 month. If you find any problem, please feel free to contact us. We will reply you within 24 hours and resolve your problem to the best of our ability.