Our Replacement Extractor Blade has the following characteristics: - Material: High-strength ABS + Food-grade Stainless Steel - Color: Grey - Size: 4inch"/10.4cm diameter, 175g -Package：1x Extraction Blade,2 x Silicone Rubber Gasket.(Notice: 1 x Silicone Rubber Gasket O Ring pre-installed already in the blade.) Please note - The Replacement Extractor Blade recommend replacing the blade unit after 6-months anyway - Please check the rubber gasket and be sure it is put snugly into the bottom blade. (The rubber gasket is used to avoiding leakage - Do not overfill to avoid spilling, do not add ingredients past the "Max" line - Do not run your blender over 4 minutes at a time to prevent overheating of the blender -To clean the blade, we suggest washing it with warm water immediately after use and using a brush for hard-to-reach areas. Avoid washing the blade in the dishwasher. -Do not freeze the cups as it can make them brittle and prone to cracking -Before using the blade, ensure the gasket is snugly in place and check the gear at the bottom. If it's loose, please tighten it for best performance. Product quality and customer satisfaction is our top priority.