Kald Int'l Industry Limited is one of the leading China square box 4"*4" extension ring manufacturers and suppliers, and also a professional company and factory, welcome to buy low price and high-quality square box 4"*4" extension ring and wholesale our good products.
| Thickness | ||
| 1-1/2" deep | 1.5mm | 1/2” or 3/4” k.o. |
| drawn | 1.2mm | 1/2” or 3/4” k.o. |
| 1.0mm | 1/2” or 3/4” k.o. | |
| 0.8mm | 1/2” or 3/4” k.o. |
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