


6391 Double Lip Nitrile Rotary Shaft Seal (0.625x1.377x0.25 Inch)
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
6391 Double Lip Nitrile Rotary Shaft Seal (0.625x1.377x0.25 Inch)Acrylonitrile butadiene rubber (NBR) is the material name for nitrile rubber. This material is very good for seals due to its make up. Nitrile rubber can tolerate short term dry running of the sealing lip. The operating temperature range without failure of nitrile rubber is 40 to +100 C. SKF also offers a special nitrile rubber compound with a temperature range between 55 and +110 C. Please click here for a full in depth look at the SKF range of CR
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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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Size: King (Pack of 1)
An adjustable pillow
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Reviewed in the United States on August 12, 2024
★★★★★ 5
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Love it! Great support.
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Reviewed in the United States on April 28, 2026
★★★★★ 1
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Size: King (Pack of 1), Size: King (Pack of 1)
I have only had this pillow for 8 month and it is flat and not comfortable anymore. I sent the company an email and they never responded. I do now recommend that you buy this pillow.
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Reviewed in the United States on January 10, 2024
★★★★★ 2
The pillows have a chemical smell
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Reviewed in the United States on October 28, 2025
★★★★★ 5
Simply The Best
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It appears there are more than 1,000 pillows advertised and available all over the Internet. The situation is a comedy routine. If you want a cooling pillow because you're a hot sleeper or if you want a plush pillow for back problems or a combination or neither, it doesn't matter. Be prepared to read 1,000 different advertisements until you start laughing out loud. This is what I did, but I wandered upon this Marlow Pillow system and then trusted the Amazon ratings. And boy am I happy, though a word of caution: if you want the cooling technology to really work you've got to pair this pillow with the Marlow pillow protector. Because Amazon didn't carry the pillow protector I bought it directly from Marlow. And this is the last pillow I'll ever get or need to get. Comfortable like a goose down pillow and yet cool to the touch and cool all night long. So I got lucky; have avoided having to buy multiple pillows; and now am enjoying the heck out of my Marlow King with the Marlow pillow protector. Lastly, this pillow is adjustable with a zipper and it works: you can make it softer or harder with a quick zip. The best pillow out there, by far!
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