Atama Length:27.5± 1.0 mm
Shield Diameter:50.0 ± 1.5mm
Head Width:16.4 ± 0.3 x 13.3 ± 0.3 mm
Shied Thickness:4.0 ~ 6.8 ± 0.8 mm
Avg. Wall Thickness:1.8 ± 0.3 mm