A set of 3 units
Part # 00.1918.183.000 x 2
61803 Zipp 30/60 88 Front Hub Shell, 188 Rear Hub Shell
30/60/S9 Rear Free Hub Body (includes bearing and one grease syringe)
Part # 00.1918.183.001 x 1
61903 Zipp 30/60 Rear Hub Shell (includes bearing and one grease syringe)