[SECURE CLIP-ON CONSTRUCTION] - Designed with a spring draw bar structure

and also avoid using household detergents or soaps

Bridge(DBL) about 15/16 inches (24mm)

Bridge(DBL) about 9/16 inches (14mm)

very lightweight

Transition Photochromic Reading Glasses BS163 Magnification Strength:+2.00 [SECURE CLIP-ON CONSTRUCTION] - DesignedAcrylic lens, plastic frame with spring hinges Frame width about 5 7 16 inches (138mm) Lens width about 2 1 16 inches (52mm) Lens height about 1 7 16 inches (37mm) Bridge(DBL) about 1 2 inches (13mm) Temple length about 5 5 16 inches (135mm) PHOTOCHROMIC LENSES Transparent lenses in the door, it will be change to grey color in the sunshine within 10 minutes.