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Description
12" Diameter | 5-Blade Fan | 25° Pitch | CCW Rotation | 5/16" Bore | NBK-21188NBK 21188 12" Diameter 5 Blade Fan 25 Pitch CCW Rotation 5 16" Bore OEM Replacement for Acme 31215 The NBK 21188 Fan Blade is a high performance 12 inch replacement fan designed for HVAC and industrial ventilation systems. With its 5 blade configuration, 25 pitch, and counterclockwise (CCW) rotation, this fan blade ensures efficient airflow and reduced vibration. It serves as a direct OEM equivalent replacement for Acme part number 31215 and includes
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.8 ★★★★★
Based on 553 reviews
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Product Reviews
★★★★★ 1
Completely useless
Format: Paperback
Do not recommend complete waste of time
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 22, 2025
★★★★★ 2
Disappointed
Format: Paperback
I’m thrilled that Ray Peat’s books are finally accessible to a wider audience, but I was disappointed to receive my copy in such bent condition.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 16, 2025
★★★★★ 5
Love this author!
Format: Hardcover
I love this author she is so helpful I love all her books! She is an excellent therapist and very helpful!
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Reviewed in the United States on April 27, 2026
★★★★★ 5
You'll love this book. Well worth the money
Format: Hardcover
I love reading this daily. It provides enough food for thought for me to think on throughout the day.
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Reviewed in the United States on April 2, 2026
★★★★★ 5
Set those boundaries!
Format: Hardcover
My favorite book on the shelf. Definitely worth reading more than once.
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Reviewed in the United States on March 19, 2026
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