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Description
Whatman 1851-050 Filter Circles, 50mm Dia, Air Sampling Quartz QM-A, 100/pk (PN:1851-050)QMA 5. 0CM 100 PK Quartz Filters Grade QM A Circles, 50 mm 100 pk. High purity quartz microfiber filters are used for air sampling in acidic gases, stacks, flues and aerosols, particularly at high temperatures up to 500 C and in PM 10 testing.
QMA 5.0CM 100/PKQuartz Filters - Grade QM-A Circles, 50 mm 100/pk. High-purity quartz microfiber filters are used for air sampling in acidic gases, stacks, flues and aerosols, particularly at high temperatures up to 500° C and in PM-10 testing.
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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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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4.1 ★★★★★
Based on 20 reviews
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Product Reviews
★★★★★ 5
Good
Style: High Mileage 150K, Size: 5 qt (Pack of 1), Configuration: 5W-30
Good oil. Stopped leak
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 1, 2026
★★★★★ 5
a great new high mileage oil
Style: High Mileage 150K, Size: 5 qt (Pack of 1), Configuration: 5W-30
this oil actually made my high mileage (230k) car run better .
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Reviewed in the United States on April 13, 2026
★★★★★ 5
Good motor oil
Style: High Mileage 150K, Size: 5 qt (Pack of 1), Configuration: 5W-20
The engine oil meets the stated requirements.
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Reviewed in the United States on March 24, 2026
★★★★★ 5
Definitely buying again.
Style: High Mileage 150K, Size: 5 qt (Pack of 1), Configuration: 5W-20
In MY experience, this has been fantastic, spouses car is a 200k+ mileage Kia shortage, which I mean, it’s always burned oil, even the manual said normal operation can burn 1qt per 1,000 miles. Either way, i was adding oil a lot. At least 2 quarts a month or more. After running this oil, I have only added 1.5 quarts in over 2 months. Results obviously not typical, but in my experience, this stuff works. I also use the restore and protect Valvoline on my car, with great results. Scoped it after a few full oil changes and engine looks clean. Great value for what it potentially will do.
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Reviewed in the United States on March 2, 2026
★★★★★ 4
Kitties love it:
Style: High Mileage 150K, Size: 5 qt (Pack of 1), Configuration: 5W-30
Great product:
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Reviewed in the United States on April 23, 2026