PLAYSIL-X Juggling Ball - Filled with Liquid Silicone - 100mm, 300g (Red)

This is my favorite contact juggling practice ball. I have been using one for a few months now. I ordered more for practicing multi-ball body rolls and stalls. My performance balls are custom made (liquid silicone filled stainless steel) to closely match the characteristics of this ball.For this ball, Play makes a hole in their 260g stage ball; adds 40g of silicone oil; then plugs the hole. On occasion the plug may come out. Check the plug after every drop. The one time a plug came out on me, it sounded like someone had grabbed a goose by the tail. I live in Colorado (high elevation) and I think the balls come from Italy (lower elevation). The stored internal air pressure caused the ball to spit silicon oil all over the place while making the strange noise. I depressurize the balls now by pulling the plug out enough to “burp” the ball, then re-insert the plug.One will not be able to make a seamless transition from this ball (300g) to a much heavier (665g) undamped 100mm acrylic ball. You will still need to practice a lot with your acrylic. The nice thing about this ball is; it will not do as much damage as an acrylic when it gets away from you; and you won’t have to chase it as far.Side note: Dawn liquid dish soap does a decent job getting silicone oil out of a silk oriental carpet.

If you apply pressure to this ball (I'm not talking about a lot of pressure, just squeezing it in your hand), the silicone oil will come out the plug.The plug looks to be glued, melted, or whatever, permanently into the ball. So, I don't think it should leak. But, it does. And since the plug does not appear to be removable, it a significant portion of the silicone does leak out, you can't open the plug to replace it - the ball is ruined.And by the way, luckily mine leaked onto my hands and a hard surface. If you got silicone oil on your carpet or furniture, good luck getting it out. This is a hazardous thing to have sitting around.I'm giving it 2 stars instead of one because, until it leaked, it does do what it is supposed to do. It would be a fine ball if they sealed it better. And maybe the one I got was just defective, but there are tons of companies that sell balls like this. If I were you, I'd but a different brand rather than take the risk.I would also look for one that has a higher viscosity silicone oil in it, because the oil in this one doesn't damp motion as much as I would like. I don't think they list the amount of oil or viscosity, but manufacturers of these products really should do that since it will have a large effect on how the ball moves.

Love it.