 
Product
804304  Geardiff pully front alu 35T
804301  Geardiff pully rear alu 40T
804197  Pulley 21T mid side alu
804196  Pulley 18T mid alu
804199  Pulley 21T 2-sp side alu 
804198  Pulley 20T 2-sp center alu
Product-description   Stunning aluminium geardiff pullies for the Serpent 747.  PTFE hard-coated  machined alu inside  with precision tooth profile  and pressed on superlightweight anodized sidecovers with small holes to allow dirt to move out easy.