Starrett 98 4 4" Precision Machinists' Level

4" precision machinists' spirit level for determining horizontal plane Ground glass vial resists scratching to provide clear readings and is housed in a brass tube with a friction-fit closing to resist breakage Vial has a sensitivity of 4 to 4.5 minutes and is adjustable to a positive setting for accurate results V-shaped groove along the base provides reliable seating when leveling round items Cast iron base for durability Ground and graduated main vial Adjustable to a positive setting The vial is housed in a satin chrome finished brass tube with a friction-fit closing cover to prevent breakage The size of the level is 100 mm