Sanko Optical Slendy SD-030 C-6 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 like rubber and has high strength, is also strong, is far more resistant to rust than general titanium alloys, and is also extremely gentle to the human body, making it a metal (titanium alloy) like rubber. Moreover, it is lightweight, making it very comfortable to wear. 《Size》48□15-133 Lens vertical width 25mm Frame horizontal width 128mm 《Color》Blue ※This cannot be used as is. Please have your prescription lenses put in at a nearby eyeglasses store, or we can also put in 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 in the comment section.