Feature: 1. OEM number for reference: 3818541, 3583654, 21702999, replacement for D4 D6 D9 D11. 2. Effectively improve airflow, increase engine efficiency while running and provide clean filtered air. 3. Prevents harmful dust and debris from entering internal engine components, extend engine life. 4. Simple installation, no need of complicated tools, directly replace the old or damaged air filter. 5. Manufactured to meet expectations for fit, form, and function, this filter is reliable to use. Specification: Item Type: Air Filter Material: Filter Paper Length: Approx. 300mm/11.8in Width: Approx. 240mm/9.4in Thickness: Approx. 35mm/1.4in OEM: 3818541 / 3583654 / 21702999 Replacement for Crom Marine: 117303 Replacement for Orbitrade: ORB17999 / 17999 Fitment: Replacement for D4-180I-B D4-180I-C Replacement for D4-180I-D D4-180I-E Replacement for D4-210A-A D4-210A-B Replacement for D4-210I-A D4-210I-B Replacement for D4-225A-B D4-225A-C Replacement for D4-225A-D D4-225A-E Replacement for D4-225I-B D4-225I-C Replacement for D4-225I-D D4-225I-E Replacement for D4-260A-A D4-260A-B D4-260A-C Replacement for D4-260A-D D4-260A-E Replacement for D4-260D-B D4-260D-C Replacement for D4-260D-D D4-260D-E Replacement for D4-260I-A D4-260I-B D4-260I-C Replacement for D4-260I-D D4-260I-E Replacement for D4-300A-A D4-300A-C Replacement for D4-300A-D D4-300A-E Replacement for D4-300D-A D4-300D-C Replacement for D4-300D-D D4-300D-E Replacement for D4-300I-A D4-300I-C Replacement for D4-300I-D D4-300I-E Replacement for D6-280A-A D6-280A-B D6-280A-C Replacement for D6-280A-D D6-280A-E Replacement for D6-280I-A D6-280I-B D6-280I-C Replacement for D6-280I-D D6-280I-E Replacement for D6-310A-A D6-310A-B D6-310A-C Replacement for D6-310A-D D6-310A-E Replacement for D6-310D-B D6-310D-C Replacement for D6-310I-A D6-310I-B D6-310I-C Replacement for D6-310I-D D6-310I-E Replacement for D6-330A-B D6-330A-C Replacement for D6-330A-D D6-330A-E Replacement for D6-330D-B D6-330D-C Replacement for D6-330D-D D6-330D-E Replacement for D6-330I-B D6-330I-C Replacement for D6-330I-D D6-330I-E Replacement for D6-350A-A D6-350A-B Replacement for D6-370A-B D6-370A-C Replacement for D6-370A-D D6-370A-E Replacement for D6-370D-B D6-370D-C Replacement for D6-370D-D D6-370D-E Replacement for D6-370I-A D6-370I-B D6-370I-C Replacement for D6-370I-D D6-370I-E Replacement for D6-400A-E Replacement for D6-435D-A D6-435D-C Replacement for D6-435D-D D6-435D-E Replacement for D6-435I-A D6-435I-C Replacement for D6-435I-D D6-435I-E Replacement for D9A2A D9-425 D9A2A D9-500 (R4) Replacement for D9A2A D9-575 D9A2A D9A-MG Replacement for D9A2A D9A-MH Replacement for D9A2B D9-425 D9A2B D9-500 (R5) Replacement for D9A2B D9-575 D9A2B MH Replacement for D9A2C D9A2D D9A2E D9A2F Replacement for D9A2G D9A2H D9A2J D9A2K Replacement for D11A-A D11A-B D11A-C D11A-D . Package List: 1 x Air Filter Note: Please double check the part number of your item, matching information is for reference only. If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks!