Type B Polypak® Rod/Piston U-Seal 5.500" x 5.875" x 0.375" - AU/NBR

Marsoni

M251S

$81.01

Get it in 3 business days with 1 day shipping. Friday, May 29

Type B Polypak® Rod/Piston U-Seal 5.500" x 5.875" x 0.375" - AU/NBRProduct Details : Type B Polypak Rod Piston U Seal 5. 500" x 5. 875" x 0. 375" AU NBR Part No: 18705500 375B 4615 Product Category: Symmetrical Seals Product Type: Rod Piston U Seal Profile: Type B Polypak Material(s): Polyurethane Nitrile Material Code: AU NBR Temperature Range: 65F to +200F ( 54C to +93C) Pressure Range: 5000 PSI ( 345 Bar) Surface Speed: < 1. 6 ft s (0. 5 m s) System Of Measurement: Inch Dimensions: 5. 500" x 5. 875" x 0. 375"

Easy Shipping

Quick Dispatch:

Your Type B Polypak® Rod/Piston U-Seal 5.500" x 5.875" x 0.375" - AU/NBR orders ship within 1-2 business days.

Delivery Options:

Standard: 3-7 business days
Fast: 2-3 business days
Express: 1-2 business days

Order Tracking:

You'll receive a tracking link by email once your Type B Polypak® Rod/Piston U-Seal 5.500" x 5.875" x 0.375" - AU/NBR ships.

Need Help?
Questions about Type B Polypak® Rod/Piston U-Seal 5.500" x 5.875" x 0.375" - AU/NBR, sizing, or delivery? We're just an email away.

Live Shipping Estimates:
Enter your location at checkout to see available shipping methods and costs for Type B Polypak® Rod/Piston U-Seal 5.500" x 5.875" x 0.375" - AU/NBR in your area.

Get Shipping Estimates

Country Zip/Postal Code

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

I’ve gone through a bunch of pillows over the years, but this BETU Cooling Pillow is by far the best one I’ve ever used. I sleep in literally every position—on my back, stomach, and sides—and this pillow works perfectly no matter how I’m laying. It really does have a cooling effect, which I love as a hot sleeper. Just make sure your room is cool too, and it makes a big difference. It came vacuum-packed, but it fully expanded within just a few hours. I was able to sleep on it the same day it arrived, and it was super comfy right from the start. I also washed and dried the pillowcase before using it, and it came out looking and feeling great—no shrinking or damage at all. Honestly, I look forward to going to bed every night now just because of this pillow. It’s supportive, comfortable, and totally worth it!

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on February 21, 2026

Verified Purchase

Amazon Customer

Grantham, US

★★★★★ 5

Excellent pillows!

Size: Queen, Number of Items: 2

This pack came with 2 pillows, one firm and one that was flatter and squishy. I absolutely love the flatter one! Most comfortable pillow I've ever used! The firm one was a bit too much for me, but my husband loves it.

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on March 28, 2026

Verified Purchase

Phanessa Hernandez

West Palm Beach, US

★★★★★ 3

It’s alright.

Size: Queen, Number of Items: 2

Not bad pillows. They are comfortable but mine came with an odd odor, kind of mildewy smell to it. Had to spray it down to tolerate sleeping on it.

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on May 5, 2026

Verified Purchase

ALEXANDRA W.

Draper, US

★★★★★ 5

Nice pillows

Size: Queen, Number of Items: 2

Have had these a few months and so far really like them! They don’t really feel very cooling, but I also run VERY HOT so it could just be me. The foam holds up well and hasn’t flattened like others I’ve tried. They come very compacted- I was shocked how much they expanded!

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on March 22, 2026

Verified Purchase

Balous belote

Bozeman, US

★★★★★ 5

Mr.b

Size: Standard, Number of Items: 2

The pillows are cool and comfortable

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on May 27, 2026