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Description
Gates Hi-Power II PowerBand V-Belts 12/B138Part # 12 B138 Product # 909312138 Description 12 B138 HI POWER II PWRBND BELT UPC 770075356684 Cross Section B Effective Length (in) 140. 9 Effective Length (mm) 3579 Outside Circumference (in) 141. 75 Outside Circumference (mm) 3600 Section B Strand 12 Top Width (in) 0. 66 Top Width (mm) 17 Angle. 40 Thickness (in) 0. 47 Thickness (mm) 12
| Part # | 12/B138 |
|---|---|
| Product # | 909312138 |
| Description | 12/B138 HI-POWER II PWRBND BELT |
| UPC | 770075356684 |
| Cross Section | B |
| Effective Length (in) | 140.9 |
| Effective Length (mm) | 3579 |
| Outside Circumference (in) | 141.75 |
| Outside Circumference (mm) | 3600 |
| Section | B |
| Strand | 12 |
| Top Width (in) | 0.66 |
| Top Width (mm) | 17 |
| Angle. | 40 |
| Thickness (in) | 0.47 |
| Thickness (mm) | 12 |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
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4.5 ★★★★★
Based on 10 reviews
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Product Reviews
★★★★★ 5
Great supplement
I like the way it helps me relax to sleep and helps to keep me more focused
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 3, 2026
★★★★★ 5
No diarrhea
My wife had severe diarrhea using a common type of magnesium, taken at doctor's recommendation. Doctor recommended this type, L-Threonate. Totally eliminated diarrhea problem.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 15, 2026
★★★★★ 5
Magnesium
Helps with sleep, relaxation, and muscle cramps
* Can support mood and reduce stress
* Good for overall body function (nerves, muscles, heart)
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 23, 2026
★★★★★ 4
High Quality
My husband is deficient in magnesium and these by far looked like they were of the highest quality . Not sure yet if they help him sleep better but will be purchasing them again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 8, 2026
★★★★★ 5
Better sleep, better mood
This definitely helped my mood and sleeping. It literally changed my default. The only electrolyte that can pass the blood brain barrier. I recommend.
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Reviewed in the United States on May 9, 2026