This is an optional Oxy Heli 23T Tail Pulley. A smaller Tail Pulley is helpful for pilots who are flying lower headspeed, or converting the Oxy 4 from 325 to stretch 350-360mm. A stretch typically requires less headspeed for similar performance, and thus the 23T pulley is a great choice to maintain the same tail performance as with the standard 325 version of the Oxy 4.
This product was added to our catalog on February 2, 2018