Test film, polystyrene, NIST traceable, set of 2 films each mounted in 2 x 4 in card holder that fits into universal slide mount. Includes certificate of traceability to five NIST 1921b frequencies
- Unit of Measure:
- EA
- Notes:
- Polystyrene test films, 2/pk, mounted to 2 x 4 inch cardstock holder that fits in the universal slide mount
