Unbranded 4 5V 21.2 TB 3535 4 Groove Sheave/Pulley 21.2" dia. [5V Type] Belt.
Takes a 3535-taper bushing.
[Please Look at all the pictures they are part of the description]
These are new old stock pulleys may show shelf wear and dust from sitting around for many years.
[B1-F1-R4-S1-1]