The 14mm was slightly larger than the Flexon Collins frames. I don't know if that's why I had trouble installing it. Since the material is silicone and very soft, they were not so easy to "insert". However, I was able to use a larger sewing needle to slide it through the rectangular mount on this frame. Almost gave up but insisted and put them in. If you try this, be careful not to slip on the needle and scratch the lens. However, as soon as they feel comfortable. The soft silicone seems to prevent the glasses from slipping off π. I don't know if the reason for the difficult installation was that they are larger than the original. Does more make the attachment point protrusion bigger? However, once installed, they are soft and comfortable. Now only time will tell.
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