Model: Double-spring KarabinerModel No.: MT2803BK /MT2803PL /MT2803MCSpring Material: 304 Stainless SteelBulk Material: 420J2 Weight:6g (0.21oz.)Size: 60*22.7*6.5mm(2.36”*0.89”*0.256”)Finish: Black Titanium/Rainbow Titanium/Polishing