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Description
GVS 1215557 PreSep™, Filtration Membrane, Glass Fiber 13mm 1.0 µm (G20)Glass Fiber filter Membrane with Binder (G20),1. 0 m, 13 mm diameter, 100 pk GVS Pre Sep(TM) Glass Fiber membranes With Binders. 1 2um, 13mm diameter. Composed of borosilicate glass fibers woven into a porous matrix and bonded by an acrylic resin. This bonding produces a filter that reduces media migration and has the strength required for high volume aqueous filtrations. Features and Benefits biologically inert, autoclavable and highly resistant to
Glass Fiber filter Membrane with Binder (G20),1.0 µm, 13 mm diameter, 100/pkGVS Pre-Sep(TM) Glass Fiber membranes With Binders.
1-2um, 13mm diameter. Composed of borosilicate glass fibers woven into a porous matrix and bonded by an acrylic resin.
This bonding produces a filter that reduces media migration and has the strength required for high-volume aqueous filtrations.
Features and Benefits
Applications
Recommended for filtrations of long duration under pressure.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
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4.1 ★★★★★
Based on 2080 reviews
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Product Reviews
★★★★★ 5
Fast Working
Size: 100 Count (Pack of 1), Style: Melatonin 1mg
I have a hard time staying asleep. I took this product the first day and slept very well. I would recommend this highly. Dissolves Faunder the tongue and works sooner than capsules or pills.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 24, 2026
★★★★★ 5
Melatonin by Superior Source
Size: 100 Count (Pack of 1), Style: Melatonin 1mg
I've bought this melatonin repeatedly for years. It works gently and naturally to help me drift off to sleep and wake rested and ready for the day. I always get the smallest dose 1 mg
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 19, 2025
★★★★★ 4
So far it does help me with becoming drowsy for sleep
Size: 100 Count (Pack of 1), Style: Melatonin 1mg
So far this melatonin helps with making me drowsy, but I still take 1/2 a prescribed sleeping pill with it. Normally, within a half hour I am sleepy. I have not tried taking it by itself yet. I am a petite build, so I think my size factors in to how well it works for me. Flavor is okay. Easy to take melting it under my tongue. Price is okay. I like that it is sublingual and limited added ingredients. I don't usually take chamomile due to being sensitive to it in the past, but seems to be okay in this pill. It also seems to help me with staying asleep for a longer period of time.
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Reviewed in the United States on February 12, 2022
★★★★★ 5
Aids my sleep w/o grogginess the next day!!
Size: 100 Count (Pack of 1), Style: Melatonin 1mg
Superior Source has been a game changer in being part of my sleep aid supplements! My physician recommended this brand and dosage and I'm grateful!!
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Reviewed in the United States on May 19, 2026
★★★★★ 5
Works well.
Size: 100 Count (Pack of 1), Style: Melatonin 1mg
Works well!
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Reviewed in the United States on April 26, 2026