产品尺寸
| SIZE | φ | A | B | C |
| 1″ | 25.4 | 50.5(34) | 23 | 55 |
| 1¼″ | 31.8 | 50.5 | 28.5 | 60 |
| 1½″ | 38.6 | 50.5 | 35.5 | 70 |
| 2″ | 50.8 | 64 | 47.8 | 80 |
| 2½″ | 63.5 | 77.6 | 59.5 | 105 |
| 3″ | 76.2 | 91.1 | 72.3 | 110 |
| 3½″ | 89.1 | 106 | 85 | 146 |
| 4″ | 101.6 | 119 | 97.6 | 160 |
工业标准有：ISO、DIN、IDF、3A 等。
产品尺寸
| SIZE | φ | A | B | C |
| 1″ | 25.4 | 50.5(34) | 23 | 55 |
| 1¼″ | 31.8 | 50.5 | 28.5 | 60 |
| 1½″ | 38.6 | 50.5 | 35.5 | 70 |
| 2″ | 50.8 | 64 | 47.8 | 80 |
| 2½″ | 63.5 | 77.6 | 59.5 | 105 |
| 3″ | 76.2 | 91.1 | 72.3 | 110 |
| 3½″ | 89.1 | 106 | 85 | 146 |
| 4″ | 101.6 | 119 | 97.6 | 160 |
工业标准有：ISO、DIN、IDF、3A 等。
