1. Our filters are OEM Filters, ensuring highquality and perfect fit for your equipment. 2. With a Patented Design, these filters unique features and enhanced performance. 3. They are precisely engineered to meet or exceed industry standards, providing reliable filtration. 4. The patented design also contributes to efficient operation, reducing energy consumption if applicable. 5. You can trust our OEM Filters with Patented Design to deliver excellent filtration results and longlasting durability. Note: 1.Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2.Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 284 hours Hope you have a pleasant shopping experience!