Compatibility -- Replace NB cooker hood blades with gaskets. Please note - it has a food safe silicone seal on the bottom which is perfect for sealing without leaking. Please check that the sealing ring is in the correct position before use. Threads are smoothed for easy on and off. Practical Cooking - With the replacement blade, you can effortlessly smash fruits, vegetables and protein shakes into a delicious, smooth texture. It breaks down the ingredients into their most nutritious and easily absorbed state. unique extractionThe force generated by the blade design penetrates tough seeds, thick stems and tough skins, capturing the nutrients hidden inside. Stainless Steel Material -- The replacement extraction blade is made of stainless steel, no need for sharpening, rust-proof and durable. Easier to Cook -- Helps make healthy cooking easier. Easily make your favorite meals and smoothies to help you put meals together faster.