Piston Seal (HDP 330) 4.000" x 0.312" - Nylon/Nitrile

Marsoni

M251S

$113.61

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

Piston Seal (HDP 330) 4.000" x 0.312" - Nylon/NitrileProduct Details : Piston Seal (HDP 330) 4. 000" x 0. 312" Nylon Nitrile Part No: HDP04000 312 Product Category: Piston Seals Product Type: Piston Seal Profile: HDP 330 Style: Step Cut No. Of Pieces: 2 PCS Material(s): Nylon Nitrile Material Code: Nylon NBR Temperature Range: 22F to +212F ( 30C to +100C) Pressure Range: 8700 PSI ( 600 Bar) Surface Speed: < 3 ft s (0. 9 m s) System Of Measurement: Inch Bore Diameter: 4. 000" Dimensions: 4. 000" x 3.

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This product is AWESOME!! to be sure. The 3 sizes you will come to appreciate, as I did. They have some 'heft' to them, and the ribbed rollers are far superior to the flat rollers. I just finished installing sound/thermal mats 'under' the rear speaker shelf of my '71 spiffy GTO. Tomorrow, I expect to do under the rear seat, and I am sure happy that I have three different size quality rollers. Buy these, you can't go wrong.

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Reviewed in the United States on November 10, 2025

Verified Purchase

TDroyle

Houston, US

★★★★★ 5

High quality tools

Size: 3 Pack

These are real nice. Pretty heavy and work well. Not some light weight junk tool. I’d definitely recommend these for ….. well I was sound deadening my car, but yes these were worth the money and will last me years if I ever have to get another set.

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Reviewed in the United States on January 6, 2026

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Rob Allan

Cuba, US

★★★★★ 4

Good but maybe too narrow...

Size: 1 Pack

Buy a wider one. Functions ns well.

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Reviewed in the United States on January 5, 2026

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Leonardo Oliva

West Palm Beach, US

★★★★★ 5

Van build

Size: 3 Pack

The rollers work well they are made out of metal and not expensive

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Reviewed in the United States on March 20, 2026

Verified Purchase

T Money

Phoenix, US

★★★★★ 5

Buy it. Spend the $$$

Size: 3 Pack, Size: 3 Pack

Glad I spent the extra money and got the rollers with the ball bearings. The 3 pack came in handy. Very good quality. If you are doing more than 1 area, you will need these.

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Reviewed in the United States on June 4, 2026