Save money and buy it cheaper elsewhere
They have fun and innovative water-saving things. However, the quality and after-sales service is very poor. And the price is rather high. The supplied rubbers are too small and of bad quality. In addition, the screw thread is of poor quality, This combination causes leakage. Only if you are handy enough to tighten it very tight, purchase new rubbers and possibly other outdoor work, you will not get the systems leaking (think of the Helix and the Excelcio, I had to replace everything except the inner piece). The water-saving shower Pluvento Airshower makes a lot of noise, and the addition of air to the jet makes the water smell more. My experience with this company, is that you better buy the attachments for a cheaper price elsewhere. Or buy water savers of a different brand eg. Neoperl (Which I think have the same watersaving pieces as Sparcio )