Pay attention to before using: 1. Please check whether the gear of the bottom loosens or tighten before use. If it's loosened, please tighten it 2. Please check the rubber gasket and be sure it is put snugly into the bottom blade. (The rubber gasket is used to avoiding a leak) 3. Do not overfill! To avoid spilling, do not add ingredients past the Max fill line 4. Place the replacement blade onto the cup and screw it tightly until you have a good seal 5. Please make sure it in the right place and locked tightly Fits: It will fit glass or plastic jars, and Not fit wavestation or waveaction models. MONEY-BACK GUARANTEE: If you have questions, pls feel free to contact us, we will deal with it asap. For any reason you're not completely satisfied, you can ask for a replacement or full refund Our company specializes in the production of mixer parts, juicer parts, juicer blades, motor motors, connectors, lotus blades, ice blades, mixer bakelite bases, rotors, seals, glasses, plastic cups, stainless steel blades, mixer motors. The juicer connector, the juicer drive wheel, the mixer coupling shaft, the dry grinding cup, the juicer motor, the juicer cup cover, etc. have been for several years and have a complete and scientific quality management system. Packing including: 8Pcs x Rubber Blender Gaskets