Material: Plastic and Stainless Steel. The Replacement Flat Milling Blades made exclusively for NutriBullet 600W 900W. Outer Diameter: 4.06Inch (103mm), Hight: 1.66Inch (42mm) Fitment: for NutriBullet 600W 900W High Quality Replacement Parts. Dishwasher safe, non-toxic and never needs sharpening. This blade is made of stainless steel and the base is made of food grade plastic. Direct replacement (Included the Seal Ring). Replacement Flat Milling Blades for NutriBullet 600W 900W. Color: gray + silver Package Contents: 2pcs Juicer holder Only 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.