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D 2-3(銀色底)
銀色底長方形，內有紅色雙向箭頭。用途：標示雙向方向。
30 × 60 mm・方形
數量與價格
| 數量（小張） | 未稅單價 | 未稅小計 |
|---|---|---|
| 20 | $15.81 | $316 |
| 40 | $11.19 | $448 |
| 60 | $9.14 | $548 |
| 80 | $7.91 | $633 |
| 100 | $7.07 | $707 |
| 200 | $5.01 | $1,002 |
| 300 | $4.07 | $1,221 |
| 400 | $3.49 | $1,396 |
| 500 | $2.84 | $1,420 |
| 1,000 | $1.49 | $1,490 |
| 1,200 | $1.26 | $1,512 |
| 1,500 | $1.03 | $1,545 |
| 2,000 | $0.79 | $1,580 |