All the blender parts are high quality food grade stainless steel blades, BPA free high impact plastic.Compatible with Oster 5 & 6 Cup Glass or Plastic Jars, Replacement part kit for Oster blender.4 & 6 point blade design to pulverize and chop with precision Durable blending blade effortlessly crushes ice and works through ingredients with ease.We make no claims that these are aftermarket parts.colour: silver+blackMaterial: plastic+stainless steelPackage Contents: 1 x Crush 4 Blade1 x Crush Pro 6 Blade1 x Blender jar base1 x square drive pin4 x Rubber gasket sealsWarm tips:You are recommended to replace your Oster blade every 6 months or as needed for optimal performanceOnly the above package content, other products are not included.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.