Silicone tube 1 × 3 to 10 × 14 mm (ID × OD) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/silicone-tube/  (CC BY 4.0)
Basis: Common silicone tube sizes (ID × OD, 1–2 mm wall); each size as a 50 mm length, and 4 × 6 also at the lengths the syringe engines' transfer lines are cut to
Catalog version: 2026-10-20

Sizes: see table below
- Silicone tube sizes, ID × OD: 1×3, 2×4, 3×5, 4×6, 5×8, 6×9, 8×12, 10×14 mm; walls 1.0 to 2.0 mm. Each size is a 50 mm length at exact ID and OD; 4 × 6 also comes cut to 20, 30 and 151 mm.
- The tube stretches over a barb larger than its ID.
- For a transfer port on a can or test-tube Stirling I use 4 mm ID tube kept as short as possible, since every mL inside the tube is dead volume.
- The barbs on the hose-barb page are drawn with the shank at the tube ID and ridges at ID + 1.2 for each size.
- Cut lengths on the engines here: can engine 20 + 20 + 20 (cap barb up, across, up into the Luer tip, through two transfer elbows); Ross yoke alpha 20 + 30 + 20 through two elbows; alpha V-twin 20 + 151 + 151 + 20 through three elbows.

id_mm  od_mm  wall_mm  barb
1  3  1.0  —
2  4  1.0  barb-2mm
3  5  1.0  barb-3mm
4  6  1.0  barb-4mm
5  8  1.5  —
6  9  1.5  barb-6mm
8  12  2.0  barb-8mm
10  14  2.0  —

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Wikipedia: Hose barb — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Hose_barb
- Wikipedia: Push-fit fitting — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Push-to-connect_fitting
- McMaster-Carr: Tubing (free STEP per part, for your own design use; no redistribution) — STEP, PDF — McMaster-Carr site terms [verify license at link] — https://www.mcmaster.com/products/tubing/
- Long Earth Society: Engine and rig builds — web, video — LES site — https://longearthsociety.com/engineering/

Free files (CC BY 4.0, Xem Studio; STEP + STL, 11 parts): https://xemstudio.com/files/hardware/silicone-tube/index.json
API: https://xemstudio.com/api/geometry?object=silicone-tube