Curb key: 1. Material : Stainless steel 2. Function : Open and closes ,stop and underground warter valves Curb key:1. Function: Open , closes , stop the undergrounp water valves.2. Materila: Stainless steel.3. Size : 20048 : 5' steel. 20049 : 28" Heavy Duty Steel. 20050: 28" steel.4. For outdoor use only.Factory Pictures: Steel curb key