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Sale price: $9,999.00 Regular price:

The size of the ball is suitable for Women and U15 boys and meets the FINA standards. It is currently the official ball for France's elite-level water polo championship.

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Sale price: $9,999.00 Regular price:

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San Francisco, 735 Market St. Options

Select an available color and size to see options.

Model: 8578332

Product Videos

Product Features

A photo of the WATER POLO BALL WP900 SIZE 4 in use

WATER POLO BALL WP900 SIZE 4 | designed for advanced water polo players looking for a ball with very good grip for practice and matches.

The size of the ball is suitable for Women and U15 boys and meets the FINA standards. It is currently the official ball for France's elite-level water polo championship.


The new material and grooved design ensures excellent grip

Impact resistance

Ball designed to withstand impacts on a metal water polo goal.

Product Customer Reviews

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WATER POLO BALL WP900 SIZE 4,base color
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Bon grip

Bon grip

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Buon prodotto

Rispetto ad altre marche secondo me ha un grip migliore

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Ideale trainings bal

Ideale trainings bal

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Beste Roel,

Bedankt voor jouw goede score! Dit is heel waardevol voor ons.

Wij streven naar het allerbeste voor onze klanten !

Sportieve groeten,

Team Nabaiji


Additional Product Information


Outer shell: 100.0% Rubber - Synthetic ; Bladder: 50.0% Rubber - Synthetic, 50.0% Rubber - Isobutylene Isoprene Rubber - Butyl


Size 4: Men and U15 boys (13, 14, and 15 years old). Caution: the age categories may differ between countries.

Circumference / weight

65-67 cm / 410 grams.Circumference and weight that meet the FINA regulations (International Swimming Federation).


MAINTAINING OPTIMAL PRESSURE: Longer time between inflations thanks to the 80% butyl bladder. Butyl is the most airtight rubber.IMPROVED GRIP IN WATER: Our ball has had two upgrades compared to the WP500 ball: - wider channels for better grip.A rubber component with improved grip, called ”soft tacky”.

Product testing

Samples regularly undergo shooting tests to confirm the quality of our products. A machine throws the ball 1,500 times against a steel plate at about 50 kph. At the end of the test, the quality of the ball is assessed according to its exterior appearance and various measurements of its spherical shape.

Storage instructions

Store in a dry place away from sunlight.



Superior quality. Unbeatable prices.

For 40 years, Decathlon has delivered the best value in the retail sports industry by offering high-quality, sustainable and cost-effective products.

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    Research and development

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    Minimal retail footprint

    lowers overhead and indirect costs


Size Guide Visual