Stairville Quick Link 4mm Typ 1GV, Chain Emergency Link, Galvanised quick chain link DIN 56926 - A - 90, Material diameter: 4 mm, Opening: approx. 5.5 mm, Nominal load: min. 900 daN, With embossed labeling: RH DIN 56926-A-90 STAIRVILLE, Quick chain link NG 4 mm