?Ultimate upgrade kit is perfect for those who like to enjoy fruit smoothies and beverages at every meal Blade compatible with Oster can take ice from cubed to crushed in seconds. Let's enjoy chunk-free smoothies and shakes, grind coffee beans,...

This black Bakelite plastic screw on bottom cap is what holds the blade on the bottom of the jar. Fits most Oster blenders, Osterizers and Oster Kitchen Centers. Also fits some Sunbeam models which use a metal drive pin. ORIGINAL OSTER...