![Gauge block testing. Gauge blocks (also called Johansson gauges, slip gauges, or Jo blocks) are metal measuring standards that are used as references Stock Photo - Alamy Gauge block testing. Gauge blocks (also called Johansson gauges, slip gauges, or Jo blocks) are metal measuring standards that are used as references Stock Photo - Alamy](https://c8.alamy.com/comp/2ACFJ28/gauge-block-testing-gauge-blocks-also-called-johansson-gauges-slip-gauges-or-jo-blocks-are-metal-measuring-standards-that-are-used-as-references-2ACFJ28.jpg)
Gauge block testing. Gauge blocks (also called Johansson gauges, slip gauges, or Jo blocks) are metal measuring standards that are used as references Stock Photo - Alamy
![Rectangular Gage Block 112 PCS Grade 0 Johansson Slip Block Multi-Size: Amazon.com: Industrial & Scientific Rectangular Gage Block 112 PCS Grade 0 Johansson Slip Block Multi-Size: Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/I/41B1trQj-DL._AC_UF1000,1000_QL80_.jpg)
Rectangular Gage Block 112 PCS Grade 0 Johansson Slip Block Multi-Size: Amazon.com: Industrial & Scientific
![Rectangular Gage Block 112 PCS Grade 0 Johansson Slip Block Multi-Size: Amazon.com: Industrial & Scientific Rectangular Gage Block 112 PCS Grade 0 Johansson Slip Block Multi-Size: Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/I/71uytJncUkL._AC_UF1000,1000_QL80_.jpg)