4 E----MAX LOW SPROCKET45T,51T REAR DERAILLEUR, RD-M8100, DEORE XT, 1x12-SPEED 2009906(012 089)1/15 102221(5 3/25:ari 91422(10:9/20/22:ari 92622(10:9/29:ari----1:rtn on 10/21/22----1:rtn on 11/01/22--1 RTN ON 1-3-23