| No. | Picture | Form Factor of Subunits | Details |
|---|---|---|---|
| (1) |  |
Form of cross-sections | Circular shape |
| (2) |  |
Form of edges | Spring-like |
| (3) |  |
Arrangement pattern of subunits | Table-arrangement |
| (4) |  |
Dimensional proportion | Width 28 mm. Length 25 mm. Height 25 mm. Gap between adjacent subunits (Gbas) 5 mm. |