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Our bimetal connecting tube is made of T2 copper and L3 Aluminium.
Dimensions as below:
| Spec. | d1 | D1 | d | D | L1 | L2 | L |
| GTL-10 | 4.2 | 9 | 5 | 9 | 28 | 28 | 70 |
| GTL-16 | 5 | 9 | 5.5 | 10 | 32 | 30 | 75 |
| GTL-25 | 5.5 | 10 | 7 | 12 | 34 | 30 | 82 |
| GTL-35 | 7 | 11 | 8.5 | 14 | 40 | 30 | 90 |
| GTL-50 | 8.5 | 13 | 9.7 | 16 | 42 | 32 | 95 |
| GTL-70 | 9.7 | 15 | 11.5 | 18 | 47 | 38 | 105 |
| GTL-95 | 11.5 | 17 | 13.5 | 21 | 50 | 40 | 110 |
| GTL-120 | 13.5 | 19 | 15 | 23 | 53 | 42 | 112 |
| GTL-150 | 15 | 21 | 16.5 | 25 | 55 | 44 | 118 |
| GTL-185 | 16.5 | 23 | 18.5 | 27 | 58 | 46 | 125 |
| GTL-240 | 18.5 | 26 | 21 | 30 | 60 | 50 | 130 |
| GTL-300 | 21 | 29 | 23 | 34 | 65 | 56 | 145 |
| GTL-400 | 23 | 30 | 26.5 | 38 | 70 | 60 | 155 |
| GTL-500 | 27 | 34 | 29.5 | 42 | 75 | 65 | 165 |
| GTL-630 | 29 | 38 | 34 | 54 | 80 | 70 | 180 |
bimetal connecting tube