Starrett No. 199 15" Master Precision Level
Ground and graduated main vial of 10-second accuracy; one division equals 1/2 thousandth (0.0005) of an inch per foot, or 0.04mm per meter
Main vials have seven graduations on each side of the bubble
Auxiliary level vial shows lateral position and assists in horizontal setting
Fool-proof adjustment to avoid tampering, once set
Special alloy iron. thoroughly seasoned, is used to obtain freedom from thermal effects
Reference surface is scraped
Length 15" Width 1 5/8" Height 3"