Best in 7 days
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- USA
- CAN
Ships within 48 hours · Estimated delivery Sep 6 - Sep 11
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
Master Airscrew 1640 PROPELLOR 16-4Designed for larger 4 stroke glow engines and electric conversion models. The K series provides great performance and durability. Made of Glass Fiber Reinforced Composite in sizes 12 to 16". Propeller diameter 16" 406mm Propeller pitch 4" 102mm Hub thickness 3 4" 19. 1mm Shaft diameter 5 16" 3 8" 7. 94mm 9. 53mm * Propeller Weight 3. 1oz 87. 9g Direction of rotation Normal Tractor Material Glass Fiber R Composite Color Black
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
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.8 ★★★★★
Based on 1701 reviews
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Product Reviews
★★★★★ 5
I get a great night's sleep, plus I love the low price. Great buy
I always get a great night's sleep using this brand. Will buy again. I love the low price as well
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Reviewed in the United States on May 6, 2026
★★★★★ 5
Tabs work 100 per cent
Product worked well for my system. A bit too well. I took a whole tab the first night and l was out before planned. Too 1/4 tab the second time and it felt more natural.
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Reviewed in the United States on May 18, 2026
★★★★★ 4
Extra strength melatonin
This item is ok to take only as needed.
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Reviewed in the United States on June 4, 2026
★★★★★ 5
Good product
Worked well on my silver jewelry chains.
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Reviewed in the United States on May 12, 2026
★★★★★ 5
Amazon Melatonin? Amazing!
These work as well or better than some of the more expensive ones my wife usually gets. They don't dissolve in your mouth and they arent gummies. No extra sugars involved. Puts me to sleep quite well and allows me to stay asleep. No bad taste, no weird dreams. No side effects.
Absolute gem of a find on Amazon. Great price for a great night sleep.
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Reviewed in the United States on April 7, 2026
