of the 10 ball, were with 3 balls before the fitting easy (although still in original packaging, each bullet is individually sealed in plastic film), so that they migrated immediately in the bin. In another was the fitting about aborted halfway, even unusable so. the other provided in the pond their service, I am of the opinion that less oxygen outlet than other balls I bought 4 weeks before. These also have a slightly different shape and are heavier. the disputed balls are perfectly round, while manufacturers of other, have this in the middle of a 1 cm wide "revolving belt". can be seen in the photo so, but is not so in reality !!!
In short, the stress of the complaint, I wanted to not do that, and pay future prefer a little more, the price is not everything. 40% loss is already fierce !!