# 19 RW — Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)

For 19 RW, nominal o.d. (mm) is 1.07; nominal i.d. (mm) is 0.69; wall thickness (mm) is .191, verified against its source on 2026-08-27.

- **Gauge number:** 19 RW _(verified: appears in the quote below)_
- **Nominal O.D. (mm):** 1.07 _(verified: appears in the quote below)_
- **Nominal I.D. (mm):** 0.69 _(verified: appears in the quote below)_
- **Wall thickness (mm):** .191 _(verified: appears in the quote below)_

## What the source says

> 19     RW   1.07   1.05/1.08   .191   0.69   0.65/0.72

## Source

- https://nesmalltube.com/wp-content/uploads/2025/06/Metric_Chart_Web.pdf

Last verified: 2026-08-27. Review by: 2029-08-26.
Part of [Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)](https://referencesource.org/syringe-needle-gauge-dimensions/).