The Zahn #2 cup is 44mL (2.68 in3) and has a 0.108" orifice. The cup should be deeper than it is wide by about 2:1.
| Needle | Application | Zahn #2 Viscosity (s) |
| 0.8mm (0.031") | Inks, dyes, stains, water-based finishes | 16 |
| 1.0mm (0.039") | All purpose, water based finishes, thin lacquers | 16 - 18 |
| 1.5mm (0.051") | Primers, urethanes, enamels, varnish | 18 - 24 |
| 1.8mm (0.07") | Primers, urethanes, enamels, varnish | 20 - 22 |
| 2.0mm (0.08") | Thinned latex paint, heavy primers | 24 - 35 |
| 2.5mm (0.10") | Thinned latex paint, solvent adhesives, wax-based strippers | > 35 |