{HEAD ~ The spirit level extenders} 9 are preferably formed from {TAIL ~ extruded aluminum}, and include 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  
are preferably formed from
{ HEAD ~ The spirit level extenders } 9 are preferably formed from { TAIL ~ extruded aluminum } , and include 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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