Description:

Description:

• 81 pcs/set steel precision gage block set,  rectangular, GRADE 3--w. tollerance of 8 millionth of inch.
• All block mirror polished, with serial number and  size. 
• Complete certificate of calibration showing deviation of each block. Meets or exceed Fed. Spec. GGG-G-15C and Conform to MIL-STDD-45662A
• 9 blocks: .1001" - .1009" in .0001" steps
• 49 blocks: .101" - .149" in .001" steps
• 19 blocks: .050" - .950" in .050" steps
• 4 blocks: 1.000" - 4.000" in 1.000" steps 
• Fitted in heavy duty and precision made wooden box.