Unbranded 2B16SK 16-3/8" Od.  2 Groove B Belt Pulley/Sheave Uses SK Bushing.
 
 
This is surplus to a now closed factory that kept spare parts on the shelf the boxes may show shelf wear and have some dust on them.
 
 
[Please Look at all the pictures they are part of the description]  
 
                                                                                                          [B1-F1-R4-S2-2]