Blendin Ice Crusher Blade with Jar Base Cap, Rubber O Ring Sealing Ring Gasket Combo, Fits Oster Blenders 1 Ice Crusher Blade that replaces Part # 4961 1 Blender Jar Bottom Cap Base, Replaces Part # 4902 1 Rubber O Ring Gasket Fit most Oster Blenders that have a little square pin on top of the motor Does NOT fit Pro, Master, or Versa models. It fits models that the outside diameter of the base of the blade is 2 3/4".