Stainless Steel Blade Base The NutriBullet blade is made of high quality stainless steel and does not need to be ground. Durable and 100%. This blade is made of stainless steel and will not require sharpening, rust resistant and durable. Food Grade Seals With a food grade silicone seal in the bottom, to seal without leaks. With the all new blade, it breaks down ingredients into their most nutritious and absorbent state. Easy to Use Threads are smoothed for easy on and off. Contains a rubber gasket pre-installed in the bottom for a complete seal with the cup. Compatible with the NutriBullet 900W centrifuge. Multiple Use Double-edged blade, ideal for grinding oats and grains for coffee beans, fresh herbs and spices and for chopping nuts Effortlessly pulverizes fruits, vegetables and protein shakes in one delicious and smooth texture. Specification: Condition: 100% brand new Material: plastic + stainless steel + rubber Black color Wattage: 900W Product Size (Dia * H): Approx. 3.7 * 10cm / 1.5 * 3.9inch Package weight: approx. 155 g ~ 190 g Scope of Delivery: 1 x Blade Base 1 x Seal