GT-1 copper connecting tubes can be used to connect the circular wire and hemicycle-sector.
GT series hole-passing connection tube is made of quality T2 copper tube.
Parameters of GT-1 Connecting Tubes:
| TYPE | D | d | L |
| GT-1-10 | 8 | 5 | 52 |
| GT-1-16 | 9 | 6 | 56 |
| GT-1-25 | 10 | 7 | 60 |
| GT-1-35 | 11 | 8 | 64 |
| GT-1-50 | 13 | 10 | 72 |
| GT-1-70 | 16 | 12 | 78 |
| GT-1-95 | 18 | 13 | 85 |
| GT-1-120 | 20 | 15 | 90 |
| GT-1-150 | 23 | 17 | 100 |
| GT-1-185 | 25 | 19 | 105 |
| GT-1-240 | 27 | 21 | 110 |
| GT-1-300 | 31 | 24 | 130 |
| GT-1-400 | 34 | 26 | 150 |
| GT-1-500 | 38 | 30 | 170 |
| GT-1-630 | 45 | 35 | 190 |
GT-2 copper connecting tubes can be used to connect the circular wire and hemicycle-sector in distribution equipment or power supply cables.
GT series hole-passing connection tube is made of high-quality T2 copper tube.
Parameters of GT-2 Connecting Tubes:
| TYPE | D | d | L | L1 |
| GT-2-16 | 10 | 6.5 | 65 | 30 |
| GT-2-25 | 11 | 7 | 70 | 32 |
| GT-2-35 | 12 | 8.5 | 75 | 34 |
| GT-2-50 | 14 | 9.8 | 80 | 35 |
| GT-2-70 | 16 | 11.5 | 90 | 42 |
| GT-2-95 | 18 | 13.5 | 95 | 43 |
| GT-2-120 | 20 | 15 | 100 | 47 |
| GT-2-150 | 22 | 17 | 105 | 49 |
| GT-2-185 | 25 | 19 | 110 | 50 |
| GT-2-240 | 27 | 21 | 120 | 55 |
| GT-2-300 | 31 | 23 | 130 | 60 |
| GT-2-400 | 34 | 26 | 140 | 65 |