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Rod/Piston U-Seal (8400) 3.500" x 4.000" x 0.250" - Viton

Marsoni M251S
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Rod/Piston U-Seal (8400) 3.500" x 4.000" x 0.250" - VitonProduct Details : Rod Piston U Seal (8400) 3. 500" x 4. 000" x 0. 250" Viton Part No: 840803500 4208 Product Category: Symmetrical Seals Product Type: Rod Piston U Seal Profile: 8400 Material(s): Viton Material Code: FPM Durometer: 90A Temperature Range: 5F to +400F ( 21C to +204C) Pressure Range: Hydraulic: 2000 PSI (138 Bar) Pneumatic: 250 PSI (17 Bar) Surface Speed: Hydraulic: < 1. 6 ft s (0. 5 m s) Pneumatic: < 3. 3 ft s (1 m s) System Of
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Eli
Port Orchard, US
★★★★★ 5
Alpha one gen I
Good fit
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Reviewed in the United States on March 1, 2026
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Hank
Louisville, US
★★★★★ 5
Quality for the price
All necessary parts good quality
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Reviewed in the United States on March 16, 2026
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Amazon Customer
New York, US
★★★★★ 5
quality
prefect fit, best pricing over local outlets wanting twice as much
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Reviewed in the United States on February 19, 2026
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Amazon Customer
Waukegan, US
★★★★★ 3
Ok
Not bad not great. Quality feels cheap.
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Reviewed in the United States on December 30, 2025
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Mike H
Los Angeles, US
★★★★★ 5
Lower unit water pump
Worked fine
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Reviewed in the United States on October 16, 2025

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