[Compatibility] Fits mixing cups 18 24 32 OZ.Unit number 600 - W: NBR - 0601, NBR - 1201, Nb - 101, Nb - 101b, Nb - 101s;Device number 900 - W: nb9 - 1301, Nb - 201.Extract all the nutrients in minutes and prepare healthy, nutritious Shakes that you and your family can enjoy at home or on the go.annular replacement blades provide a better seal, are more durable, do not leak, easily adapt to a healthier lifestyle and worry-free in daily life.[2 additional seals] - Please note that the seals are pre-installed.Already in the assembly of the blades for better sealing and protection against leaks.You can use it as soon as you receive the accessory, without handling.2 extra gaskets are provided for your future replacement.Do not install additional seals during testing or use.The boards can only be sealed with gaskets.Before each use of the device, place the suction cup on the cup and twist it until it is securely closed.[Note] never immerse the blade in water.Simply unscrew the sheets, hand wash in warm soapy water and rinse.Dry the vacuum leaves thoroughly.Do not remove the gasket, as this may permanently damage the vacuum blades and cause leaks.For optimal performance, we recommend replacing your blender spare parts every 6 months or as needed.Grey color.Package contents above, excluding other products.The measurement error allowed is +/- 1 - 3 cm.