Sky is a line of mixer taps in chrome steel. The image above shows a single-hole wall mounted version. Ceramic cartridge Nobili Widd 35. Sky is fitted with "Nobili WaterSaving", a water saving device, and "Nobili Energy Saving", which prevents a wasteful use of hot water. Both technologies make Sky extremely energy efficient. Sky was introduced as a new product at the 2012 Cersaie, Bologna.