Attributes . Eurocube Semi-Pro: 31 401; GROHE Blue: 31 251, 31 312, 31 608; K7 Semi-Pro: 32 951, 31 380; Kitchen/Bar Faucets: 31 055, 31 074, 20 179, 30 026, 31 041; O-ring ? 10 x 2.2 mm . Names