Product Specifications Material : Stainless Steel + Plastic + Silicone Color : Black Compatibility : Enjoy Your Healthy Daily Life with Ultimate Upgrade Replacement Parts for Oster Blender Not Compatible With : The cuchilla for oster licuadora is NOT suitable for Oster Por, Master, In2uitive Series, Versa or Xpert models. Package Included : 1 x 4-point blender knife for oster1 x jar bottom cap 49022 x rubber seal O ring 4 PCS total for your Osterizer blender replacement parts TIPS FOR USAGE You are recommended to replace your Oster blade every 6 months or as needed for optimal performancePlease check the rubber sealing gasket and be sure it is put snugly into the bottom base cap.(The rubber gasket is used to avoiding leakage)Do not run your blender over 4 minutes at a time to prevent overheating of the blender Enjoy Your Healthy Daily Life with Ultimate Upgrade Replacement Parts for Oster Blender Sturdy Plastic Base High impact plastic base Plastic shell with a plastic base supported by 6 ribs for greater stability Blender Blade High Quality Stainless Steel Blades The 4-page blade is made of stainless steel, well-made, durable, and not easy to deform, and can crush soft or hard mixtures very well Tight Fitting Silicone Gasket High density silicone gasket Two O-ring seals, made of food grade silicone,have excellent sealing performance to prevent mixture leakage