Size 5 Rugby League Match Ball, 4ply with high air retention balanced bladder

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Rugby league player Vaughan Calcinai on stunning goalkicking streak

From the article (above link)
It is perhaps more than a coincidence that the brand of ball used in the WaiCoa Bay competition has changed this year from the traditional Steeden to a local Silver Fern Sport product, and Calcinai reckoned that was the only thing he could put his success down to.
“It’s maybe not as long as the Steeden is, so maybe the aerodynamics are a little bit different,” he said.