Tennis Ball Pressurizer – Converts Compatible Tennis Ball Container into a 30 psi Ball Pressurizer & Extends Ball Life (Pump & Container not Included in Standard and Standard Plus)

Works very well if you use the right compatible container. It seemed to be complicated to use at first but it actually is a lot easier than it looks. It does revive used balls and keeps them with the right pressure.

Overall a good product. It seemed to be complicated to use at first but it actually is a lot easier than it looks. It does revive balls that have been used moderately (not intended to revive old, dead balls, but for preserving the life of new balls, it works well). Try to make sure to maintain this product by lubricating so pressure doesn't escape, and troubleshoot by using a wrench if the device gets stuck on the can.

This only fits with some tennis ball canisters. It works fine with the ones it fits, but it’s a bit annoying to have to go out of our way to find tennis balls that specifically have the right size canister based on the manufacturing country. For the price, I would probably prefer to just purchase the full canister-sized pressure savers instead.

So admittedly the first unit I got for some reason did not hold pressure and I ended up doing an exchange - but the seller reached out and asked several questions that I believe was genuinely trying to understand how the product may have failed which I really appreciated (kudos to the team!).On the unit itself - it is very easy to use (make sure you use the right Penn canister) - and understand that this will not resurrect completely dead balls from the grave - but definitely keeps newer ones fresher and even may revive some slightly used ones to a better condition. What I like about this unit is that it has a color pressure gauge so at least you have an idea of what the inside pressure is. Some of the harder plastic ball pressurizers leave you guessing as to the internal pressure so that is cool.Overall, I really like the extender, and I will be using this every time I open a fresh can of balls to keep them going longer!

This product is excellent for maintaining the pressure of new balls. Does exactly what it is supposed to do. However, it does not add pressure back into already-flat balls. I assumed it would, but it doesn't, and can't. The reason is that when you put a flat ball in, and pressurize the can, the flat ball will squish--actually dent--until the pressure inside the ball is the same as the pressure in the can. If the ball were rigid, then air would go into the ball, but the ball of course isn't rigid so higher pressure air outside the ball just squishes it. Oh well. It's still quite useful to have it maintain the pressure of the balls.Note that you need a Penn or Dunlop ball can. Wilson and Babolat ball cans don't fit.

I have used this for two weeks now and am not totally convinced that it truly enhances the balls performance. Firstly it does not hold its pressure fro more than 24 hours. I tried a new container and lubricating the o-ring to no avail. Tried to contact their support team via e-mail with the only response being to call their WhatsApp number which BTW is an international call for which you will be charged. I am kinda on the fence and will test the balls further to convince myself that this is not some hocus-pocus concept. Will a compressed ball re-expand once pressure inside the ball is equal to the chamber pressure? In theory it should but the canister depressurizes before I can find out. I received a FREE brand new replacement and this one seems to work perfectly well. I have to give a round of applause for the excellent product support from the technician who helped me to resolve this issue.

Muy bueno mantiene bien la presión de las bolas de tenis. De pronto cuesta un poco consegir el tarro apropiado.

Can't hold pressure. Leaks at seal while inflating and never builds pressure.