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Ships within 48 hours · Estimated delivery Sep 11 - Sep 16
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Description
BOX Cosine chainring, 104BCD x 40t - blackCNC machined 6061 T6 aluminum with rounded tooth profile to reduce chain wear Today's Stock Status 10+ Available to ship in 2 4 Business Days UPC: 639266089858 EAN: Not available Manufacturer Part Number: BX CR144B40T BK BX5840 CR3579 210909 131925 Q0 L
- CNC machined 6061-T6 aluminum with rounded tooth profile to reduce chain wearToday's Stock Status
10+ Available to ship in 2-4 Business Days
UPC: 639266089858
EAN: Not available
Manufacturer Part Number: BX-CR144B40T-BK
BX5840 CR3579 210909
131925-Q0-L
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.6 ★★★★★
Based on 8 reviews
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Product Reviews
★★★★★ 5
Just like the oem parts.
Like oem so all good.
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Reviewed in the United States on June 6, 2025
★★★★★ 5
Works well!
If you have Omni S1 pro this is everything you could ever need to maintenance for it! I have it run twice every night and you can’t beat $60 to have several repairs several times! Totally worth its money and fits exactly as if bought new!
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Reviewed in the United States on December 17, 2025
★★★★★ 5
Came as described
My order came exactly as described and in a very timely fashion. Very pleased with this purchase.
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Reviewed in the United States on December 7, 2025
★★★★★ 4
Genuine parts that keep my S1 Pro running like new
Fit & Quality:
Everything fit perfectly on my Eufy Omni S1 Pro — the rollers snapped right in, and the filters matched the originals exactly. You can tell these are genuine Eufy parts, not knockoffs.
Performance:
After swapping the brushes and mop roller, my vacuum immediately started cleaning better again. Suction improved, and it picked up fine dust I hadn’t noticed before.
Ease of Use:
Installation took less than ten minutes. Everything comes sealed and labeled clearly, which makes it simple to replace parts without guessing.
Value:
It’s a little pricey compared to third-party kits, but the quality and compatibility are worth the extra few bucks.
Verdict:
Solid replacement set that restores performance to like-new.
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Reviewed in the United States on November 2, 2025
★★★★★ 5
Great aftermarket substitute items
Great quality and fit
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Reviewed in the United States on December 16, 2024