Suburban Tool 4″ Cast Iron Box Parallel, Machined – BXP-040606

• Made from class 35-40 cast iron.
• All faces and ends finished square and parallel.
• Machined finish – Size 0.015″. Square and parallel within 0.002″ per 6″.
• Ground finish – Size 0.002″. Square and parallel within 0.0005″ per 6″.
• Made in the U.S.A.

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