Usage Tips:Package Included: The package includes 1 piece of blender blade, 1 piece of jar base cap, 1 piece of coupling stud slinger pin and 4 pieces of rubber o ring seal gaskets. A complete collocation set to meet your daily use. Quality Materials: The blender replacement parts are made of high-strength stainless steel , sturdy plastic base, rubber gasket, strong and reliable, not easy to break, long lasting. The tight-sealing jar bottom cap and O-rings prevent leaks and spills. Easy to Replace: These replacement parts are very easy to install and replace, effortlessly crush fruits, vegetables and milkshakes into a delicious texture. They can perfect for all your blending and mixing needs. Compatibility: This Blender parts for Oster Osterizer fits models that the outside diameter of the base of the blade is 2 3/4inch. (Does NOT fit Pro, Master, or Versa models. Please note that our product is not sponsored or endorsed by, or affiliated with the brands it fits, including for Oster. Product Size: Jar base cap measures 7.8x7.8x3.2cm/3.07x3.07x1.26 inch, blade 6.6x6.6x5.5cm/2.59x2.59x2.16 inch, and o ring seal gasket 6.6x6.6x0.2cm/2.59x2.59x0.07 inch, coupling stud slinger pin 3.3x3.3x3cm/1.3x1.3x1.18 inch; please check the size before purchasing. Colour:As Shown Material:Plastic Package Contents: 1 x jar base cap 1 x blender blade 1 x coupling stud slinger pin 4 x o-ring gaskets Only the above package content, other products are not included. Note: Light reflection 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.