Danco 18553B 3Z-13H/C Hot/Cold Stem for Grohe Faucets Durable brass construction Fits Grohe kitchen Series 20.100, 20.300, 20.400, 31.000, 31.7000, 31.800 Fits Grohe Lavatory Series 20.100, 20.800,21.100; Bidet Series 7.500, 24.400 For hot and cold water applications ID length 3, broach Z Complies with the reduction of low lead in drinking water act