This is a high quality injection molded plastic Nutri blade blender base with stainless steel blades. It's compatible with all Nutri Original (600 watts) & Nutri Pro (900 watts) blender accessories. - This blender cup WILL NOT WORK with Nutri Lean (1200 watts), Nutri RX (1700 watts) blenders, Magic Bullet or Ninja blenders - It works with Nutri Original (600 watts) & Nutri Pro (900 watts) only. It has a rubber gasket built in for a perfect seal with Nutri cups every time with no leaking. The threads are smoothed to make for easy on and easy off attachment of accessories. We make no claims that these are original Nutri products but they work just like the original.