Starrett No. 98 Series Machinists’ Levels 4-18"

Manufacturer: Starrett

Manufacturer Part No.: 98-

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Features

Ground and graduated main vials.

All sizes have a cross test vial except the 4" model.

12" (model also has a plumb vial and the 18" size has a double plumb vial.

Vials are adjustable to a positive setting and are housed in a satin finished brass tube with a friction-fit closing cover to prevent breakage.

Base of the levels features an involute groove running the length of the base, which provides a reliable seat for round work

The 6" through 18" main level vials have graduations that are approximately 80-90 seconds or .005" per foot

There are five, six, or seven lines on each side of the bubble, depending on the base length.