The 7-1875 Spot Plates Set contains twelve 3 1/2 X 4 1/2 polystyrene spot plates and each spot plate contains twelve 5.7mm depressions.
| Item# | Description |
| 7-1875 | Polystyrene 12 Depressions; DZ |
| 7-1876 | Porcelain, 6 Depressions; ea |
| 7-1877 | Porcelain, 12 Depressions; ea |
