Kong made stainless steel quicklinks ( maillons ).
3.5mm Weight: 9 grams. SWL: 230 Kg
4mm Weight: 13 grams. SWL: 300 Kg
5mm Weight: 22 grams. SWL: 450 Kg
6mm Weight: 34 grams. SWL: 700 Kg
8mm Weight: 79 grams. Strength: 40kN CE/UIAA
10mm Weight: 142 grams. Strength: 60kN CE/UIAA
12mm Weight: 222 grams. SWL: 3000 kg