Sanko Optical Slendy SD-021 C-3 New, unused, made in Sabae frame The biggest feature of this frame is "GUMMETAL," a new titanium alloy developed by the Toyota Central Research Institute, a think tank of the Toyota Group. It is reportedly used in car suspensions. It is flexible and highly strong like rubber, and also has a strong resilience. It is far more resistant to rust than general titanium alloys, and is also extremely gentle to the human body. It is a metal (titanium alloy) that is like rubber. Moreover, it is lightweight, so it is very comfortable to wear. The temple tips are designed like wraparound temples to hold the frame securely behind children's ears. 《Size》48□15-130 　　　　　Lens vertical width 29mm 　　　　　Frame horizontal width 128mm 《Color》Brown ※This frame cannot be used as is. Please have your prescription lenses fitted at your local optician, or we can also fit prescription lenses for you. In that case, it will take 4-7 days to ship, and the fee is an additional ¥3300~ (for both eyes). Please see the profile for details and comment. #Japanese made eyeglasses frame #Junior eyeglasses frame