Blender Jar Base and Fusion Blade Compatible with Osterizer 4961 Includes 2 Replacement O Rings [Blender Replacement Parts Suit for]:This Blender parts for oster osterizer fits models that the outside diameter of the base of the blade is 2 3/4Inch, compatible with for Oster 5 & 6 Cup Glass or Plastic Jars.Does NOT fit for Pro, Master, or Versa models.<br> [Great Function]:Replacement kit for oster , base cup Fits for most Oster blender jars, help saving your money from buying a new osterizer blender or new blender cup and also let you keep your old blender.As replacement for oster blender parts, the four-blade helps you do more morning smoothies, and other blender foods. jar that works well.<br> [Materials]: Steel blender knife and Rubber O Ring Sealing Ring Gasket.<br> Colour: as shown<br> Material: plastic + stainless steel<br> Package Contents:<br> 1 x 4-blade stirring blade<br> 1 x base<br> 2 x seals<br> Only the above package content, other products are not included.<br> Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.