520 R3-3 SRS Drive ChainRenthal&aposs SRS (Self-Regulating Seals) system increases service life of chainComes pre-stretched for less adjustment during break inRivet link has been changed to a hollow end to facilitate easier installationHigh-carbon alloy steel pins, solid bushings and rollers, and shot peening of plates and rollers for increased fatigue resistance BASE COLORGoldCHAIN TYPE520 R33COLORGoldLINKS120MODELR3PRODUCT NAMEDrive ChainSIZE520UNITSEach