Size (mm): 16 x 17, Total length (L; mm): 248, Width of glasses part (Small d1 / Large d2; mm): 22.7 / 24.1, Thickness of glasses part (Small a1 / Large a2; mm): 11.5 / 12.5
Offset amount (small t1 / large t2; mm): 14/15, Weight (g): 144
An orthodox type with a 10° offset for the eyeglass section.
I-shaped body that combines lightness and rigidity.
It uses a matte finish plating that is non-slip even with oily hands.