| 60280-19 |
RET 92, 10 Concentric Circles 0-5 mm dia., 0.5 mm divisions with 10 micron width lines, labeling every 1 mm, 19 mm dia |
| 60280-21 |
RET 92, 10 Concentric Circles 0-5 mm dia., 0.5 mm divisions with 10 micron width lines, labeling every 1 mm, 21 mm dia |
| 60281-19 |
RET 93, 10 Concentric Circles 0-5 mm dia., 0.5 mm divisions with 10 micron width lines, labeling every 1 mm, 19 mm dia |
| 60281-21 |
RET 93, 10 Concentric Circles 0-5 mm dia., 0.5 mm divisions with 10 micron width lines, labeling every 1 mm, 21 mm dia |