2" X 6"/5cm X 15.2cm 

Model   Lettering
6301     Auxiliar Drain
6302     Inspectors Test
6303     Water Motor Line
6304     Open Sprinkler Control
6305     Open Sprinkler Drain
6306     In This Building
6307     From City Main
6308     In This Section
6309     Anti-Freeze System
6310     Entire System
6311     Drain
6312     Main Drain
6313     Drain Valve
6314     Alarm Test
6315     Test Valve
6316     Control Valve
6317     Alarm Line
6318     Air Line
6319     Main Control
6320      Fire Sprinkler Valve Do Not Close
6321      Dry Stadpipe
6322      Sprinkler Drain Valve
6324      Gas Shutoff
6325      Danger Unsafe Water