Shimano RDM4120SGS Deore M4120 rear derailleur, 10/11-speed, Shadow design, SGS Long Cage Pricing RRP £41.99 £34.20
Shimano RDM5120SGS Deore M5120 rear derailleur, 10/11 Speed, Shadow Plus, SGS Long Cage Pricing RRP £46.99 £38.20