Advantages:
1. High quality
2. Professional OEM production
3. Progressive welding technique
4. more than 300 categories of products
DL Product drawing:
| Type | ? | D | d | L | L1 | A |
| DL-16 | 8.5 | 10 | 6.2 | 70 | 32 | 16 |
| DL-25 | 8.5 | 12 | 7 | 75 | 34 | 17 |
| DL-35 | 10.5 | 14 | 8.5 | 85 | 40 | 20.5 |
| DL-50 | 10.5 | 16 | 9.5 | 90 | 42 | 23 |
| DL-70 | 12.5 | 18 | 11.5 | 102 | 47 | 26 |
| DL-95 | 12.5 | 21 | 13.5 | 112 | 50 | 28 |
| DL-120 | 14.5 | 23 | 15.0 | 120 | 53 | 30 |
| DL-150 | 14.5 | 25 | 16.5 | 126 | 55 | 33 |
| DL-185 | 16.5 | 27 | 18.5 | 133 | 58 | 37 |
| DL-240 | 16.5 | 30 | 21.0 | 140 | 60 | 40 |
| DL-300 | 21 | 34 | 23 | 165 | 65 | 45 |
| DL-400 | 21 | 34 | 26.5 | 170 | 70 | 50 |
| DL-500 | 21 | 42 | 29.5 | 190 | 75 | 60 |
| DL-630 | / | 54 | 34 | 225 | 80 | 80 |
| DL-800 | / | 60 | 38 | 270 | 90 | 100 |
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