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材質；S45C，表面染黑皮膜處理
熱處理硬度：HRC32±5°
| 三角極枕 | ||||
| NO | Model | A | B | C |
| SB-53031 | 3/8(S) | 19 | 30 | 25 |
| SB-53032 | 3/8(M) | 29 | 47 | 25 |
| SB-53033 | 3/8(L) | 59 | 97 | 25 |
| SB-54041 | 1/2(S) | 19 | 30 | 32 |
| SB-54042 | 1/2(M) | 26 | 45 | 32 |
| SB-54043 | 1/2(L) | 59 | 97 | 32 |
| SB-56061 | 5/8(S) | 37 | 59 | 38 |
| SB-56062 | 5/8(M) | 59 | 97 | 38 |
| SB-56063 | 5/8(L) | 81 | 140 | 38 |
| SB-58081 | 3/4(S) | 38 | 63 | 50 |
| SB-58082 | 3/4(M) | 59 | 97 | 50 |
| SB-58083 | 3/4(L) | 81 | 140 | 50 |
