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Yongkang city, Zhejiang province, China
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| Model | steps | insulation voltage | Max load | Height (cm) | Open height (cm) | working height (cm) | Open width (mm) | top cap length (mm) | top cap width (mm) | bottom foot width (mm) | fiber stile wall thickness (mm) | step wall thickness (mm) | N.W (kg) | Packing |
| JL-504A | 3+1 | 35KV | 150kg | 127 | 117 | 86 | 755 | 325 | 130 | 480 | 2.9 | 1.5 | 4.9 | OPP shrink |
| JL-505A | 4+1 | 35KV | 150kg | 158 | 144 | 114 | 915 | 325 | 130 | 525 | 2.9 | 1.5 | 6.0 | |
| JL-506A | 5+1 | 35KV | 150kg | 188 | 173 | 143 | 1085 | 325 | 130 | 565 | 2.9 | 1.5 | 7.0 | |
| JL-507A | 6+1 | 35KV | 150kg | 218 | 202 | 171 | 1200 | 325 | 130 | 600 | 2.9 | 1.5 | 8.3 | |
| JL-508A | 7+1 | 35KV | 150kg | 249 | 231 | 201 | 1350 | 325 | 130 | 645 | 2.9 | 1.5 | 9.6 | |
| JL-509A | 8+1 | 35KV | 150kg | 279 | 260 | 230 | 1610 | 325 | 130 | 685 | 2.9 | 1.5 | 11.1 | |
| JL-510A | 9+1 | 36KV | 150kg | 310 | 288 | 258 | 1680 | 325 | 130 | 725 | 2.9 | 1.5 | 12.5 |
