**Product Specifications:**
**Brand:** CAPONI
**Patent:** Photochromic lens patent, Main classification number: G02C7/12, Patent number: CN201620160092.4, Available for online query
**Certifications:** TETHrOAT, New type specialist certificate
**Lens Features:** Under normal indoor conditions, lightens to light gray under weak ultraviolet light, darkens to dark gray under strong ultraviolet light
**Frame Design:** Wide frame for stable lens support, made of high-quality metal material, resistant to sweat and rust, providing a high-quality tactile experience
**Leg Design:** Sturdy trapezoidal striped legs made of stainless steel metal, durable and fade-resistant
**Model:** @TheDetailsShow, BS21020, INFORMATION
**Product Number:** BS21020
**Frame Material:** Metal
**Lens Type:** Photochromic polarized
**Frame Weight:** 16g
**Gender:** Unisex
**Special Features:** Rapid photochromic transition
**Frame Dimensions:** 65mm (lens width), 49mm (lens height), 17mm (bridge width), 146mm (temple length), 148mm (frame width)
**Note:** Measurements may have a 1-3mm error due to different measurement methods, data for reference only, actual product may vary
**Face Shapes:** Suitable for square, long, diamond, oval, and round face shapes
**Colors:** Available in black gunmetal frame
**Display:** Front view (normal indoor photography) - BS21020 photochromic lens, black, gunmetal, 45° side view (outdoor light photography) - X, Front view (normal indoor photography) - BS21020 polarized lens, black, gunmetal, 45° side view (normal indoor photography)
