Feature:1. It is recommend to check the bottom blade regularly and replace it every 6 months for good performance.2. The rubber gasket is installed already in this replacement blade, you can use the blade without any other operation.3. The extractor blade is made of food grade high strength stainless steel, safe and durable.4. Replace it and continue to blend your way to a healthier life‑style of nutritious shakes, smoothies, nut butters and anything you want.5. Fit for Nutri Ninjia Extractor Blade Assembly Model 303KKU 307KKU 356KKU800 322KKU770. Only fits for 16 oz cups, 6 fins.Specification:Item Type: Blender BladeMaterial: ABS+Stainless SteelColor: As shown in the pictureProduct Size: Approx. 8.5x8.5x8cm / 3.3x3.3x3.1in Weight: Approx.158g/5.6ozFitment: Fit for Nutri Extractor Blade Assembly Model 307KKU 303KKU 356KKU800 322KKU770Fit for Professional Blender with Single Serve 1100w (BL660) Fit for Professional Blender 1000w (BL610)Fit for Mega Kitchen System 1500w (BL770)Fit for Professional Blender & for Nutri Cups (BL740)Fit for Professional Blender (BL663)Fit for Professional Blender (BL663CO)Fit for Professional Blender (BL665Q)Fit for Professional Blender (CT610)Fit for Professional Blender (CT610C)Fit for Professional Blender (NJ600)Fit for Mega Kitchen System BL770W, BL771, BL771C, BL772, BL772QFit for Mega Kitchen System with Slicing/Shredding BL773CO, BL773CCOFit for Kitchen System (BL780)Fit for Ninjia Blender BL770A 30, BL770 30, BL773CO 30, BL771 30, BL772 30 500w Fit for Ninjia Blender BL780 30, BL780C0 30 200w Only the models listed exactly as a