Oster and Osterizer Blender Jar Bottom- Black - OS-55.
Univen, heavy duty bakelite plastic blender bottom screw cap.
This black bakelite plastic screw on bottom cap is what holds the blade on the bottom of the jar.
Fits ALL Oster blenders, Osterizers and Oster Kitchen Centers. Also fits some Sunbeam models which use a metal drive pin. Does not fit models that use a metal bottom cap.
