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Ships within 48 hours · Estimated delivery Jul 10 - Jul 15
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Description
GVS 1212390 PolySep™, Filtration Membrane Polypropylene 25mm 1.2 µmPolypropylene (PP) Membrane, 1. 2 m, 25 mm, 100 pk, White, Not gridded PolySep Polypropylene Membrane Filters 1. 2m, NON STERILE, 25mm diameter composed of pure polypropylene (PP) with absolute pore size ratings. Offer broad chemical compatibility allowing its use with aqueous and organic solvent samples. Features and Benefits Extremely low extractable levels provide accurate, consistent results for sensitive ion chromatography Applications and
Polypropylene (PP) Membrane, 1.2 µm, 25 mm, 100/pk, White, Not griddedPolySep Polypropylene Membrane Filters
1.2µm, NON-STERILE, 25mm diameter
Features and Benefits
Applications
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
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- We offer a 30-day return/exchange service after receiving.
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4.7 ★★★★★
Based on 2376 reviews
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Product Reviews
★★★★★ 4
Time release is the best way
I like these time released tablets. Time release is surprisingly hard to find unlike the immediate release style tablets. Time release allows for a longer sleep pattern as it enters the blood stream slowly over time allowing it to stay in you system. Immediate release will hit you hard and fast but your body will metabolize within a couple of hrs leaving you without the melatonin in you system. I took off a star for being pricey, but these do work very well.
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Reviewed in the United States on October 17, 2025
★★★★★ 5
Effective,low dose melatonin
Purchased this product again.
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Reviewed in the United States on May 7, 2026
★★★★★ 3
Three Stars
Will help you sleep.
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Reviewed in the United States on October 8, 2016
★★★★★ 5
Good
The only melatonin that works for me
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Reviewed in the United States on April 2, 2026
★★★★★ 5
Source Naturals Melatonin is the best!
My husband and I have been using Source Naturals Melatonin for almost 25 years. I have tried a few other brands, and I definitely think Source Naturals is the best! I once saw a program on Discovery channel about how Melatonin is an important heart antioxidant, and that after age 40 the Melatonin in our system goes way down. We had also just moved to a high altitude town, and I was having great difficulty sleeping because of the high altitude. We started taking Source Naturals Melatonin, and I was able to sleep like a baby. I really recommend the time release especially, and we also take a 1 mg sublingual lozenge to fall asleep more quickly.
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Reviewed in the United States on August 27, 2017