The three-hole mixer is part of VOLA Collection. Three-hole mixer combination consisting of 2 pcs. ¼ turnceramic stop valves S50, swivel spout 090G with water saving aerator, 3 pcs. 60 mm circular flanges 001.Inlet/Outlet: ½". Hole cut out size, valves: 28 mm - 35 mm. Hole cut out size, spout: 21 mm, max. 29 mm.