{HEAD ~ The spirit level extenders} 9 are preferably formed from extruded aluminum, and include {TAIL ~ a top surface} 14 on which a spirit levels leveling face 2 is intended to be placed, and a bottom surface 16 to be placed on a surface whose inclination is to be determined  
include
{ HEAD ~ The spirit level extenders } 9 are preferably formed from extruded aluminum , and include { TAIL ~ a top surface } 14 on which a spirit levels leveling face 2 is intended to be placed , and a bottom surface 16 to be placed on a surface whose inclination is to be determined
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