<p>Here is a question worth sitting with: why does a brand new can of balls go flat in a fortnight? Because the bounce was never in the ball. It was in the pressurised air inside it, and air leaves. That is the whole problem, and a pressureless ball is the whole answer.</p>
<p>The Diadem Premier Pressureless is built the other way round.
Instead of a thin rubber shell holding compressed air, it has a larger, denser, thicker rubber core, so the bounce comes from the material itself and not from something trying to escape.
There is no pressure to lose, which means no dead cans at the back of the cupboard, no over-inflated first ten minutes, and a ball that stays playable for hundreds of hits rather than a couple of sessions. It is covered in TTI 3453 felt.</p>
<p>The case is 24 boxes — 72 balls — and it comes in plastic-free packaging.
This is a teaching purchase, honestly stated: it is what you buy for a ball cart, a ball machine, a coaching hopper, a wall, or a junior session where the same ball gets hit four hundred times in an hour. It is also the right ball at altitude, where a pressurised ball comes out of the can already too lively.
What it is not is a match ball for a tournament weekend — a pressureless ball plays heavier off the racquet than a pressurised one, and it should, because it is built to still be doing that in six months.</p>
<p>Ely is the right place to think about the long game.
This is the smallest of English cathedral cities, a little over twenty thousand people on a clay island rising to eighty-five feet above the Fens, and it has been quietly outlasting things since the eleventh century. Its cathedral has been called the Ship of the Fens for so long that nobody argues about it.
You will use these everywhere from a school court on the edge of town to a public court by the Great Ouse, and by the way — this is a city that celebrates the eel, an animal that swims from the Sargasso Sea to get here. Endurance is the local religion. Seventy-two balls that refuse to die will fit right in.</p>
<p>Diadem Premier Pressureless Tennis Ball Case</p>
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