D.I.D. 520STD-124 Standard Series Chain with Connecting Links Professional V series o-ring chains are high-quality O-ring chains with excellent wear resistance Features solid bushings with reinforced rollers for great impact resistance and the longest possible wear life The projected wear life is 235 times longer than a standard chain under similar conditions Weight per 100 Links: 3.30 lbs.; Tensile Strength: 6,830 Lbs.; Maximum engine displacement: 500cc Clip Type Master link included