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| Art No. | Size | Dimensions (inch) | WLL | Weight | |||
| inch | B | E | R | carbon(ton) | alloy(ton) | lb/pc | |
| GK21-1/4 | 1/4" | 0.53 | 0.33 | 1.86 | 1.18 | 1.63 | 0.33 |
| GK21-5/16 | 5/16" | 0.62 | 0.44 | 2.28 | 1.77 | 2.45 | 0.57 |
| GK21-3/8 | 3/8" | 0.81 | 0.50 | 2.69 | 2.45 | 3.40 | 0.92 |
| GK21-7/16 | 7/16" | 0.75 | 0.55 | 2.94 | 3.27 | 4.54 | 1.23 |
| GK21-1/2 | 1/2" | 0.88 | 0.66 | 3.37 | 4.17 | 5.78 | 1.80 |
| GK21-5/8 | 5/8" | 1.06 | 0.78 | 4.10 | 5.78 | 8.62 | 3.30 |
| GK21-3/4 | 3/4" | 1.38 | 0.94 | 5.15 | 8.39 | 12.25 | 5.98 |
