Hobby brass tube (K&S), 1/16–21/32 in and 1–12 mm, telescoping — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/brass-tube-ks/ (CC BY 4.0) Basis: K&S Precision Metals round brass tube: imperial sizes in 1/32 in OD steps with .014 in (0.36 mm) wall; metric 1–12 mm OD with 0.45 mm wall Catalog version: 2026-10-20 Sizes: see table below - Imperial series telescopes: each size slides inside the next 1/32 in larger (OD 1/8 → ID of 5/32 is 0.128 in). Metric series telescopes in 1 mm steps (0.45 wall leaves 0.1 mm clearance). - Also sold in aluminium (.014 wall, softer) and stainless (.010–.014). Cut with a tube cutter, deburr inside or the telescope jams. - Why it's here: displacer rods and push-rods (3/32 and 1/8 in), displacer bodies (telescoping 1/2 → 17/32 for a close-fit sleeve), regenerator tubes, and thermocouple sheaths on the LES engines. size od_mm wall_mm id_mm 2/32 in 1.59 0.36 0.88 3/32 in 2.38 0.36 1.67 4/32 in 3.17 0.36 2.46 5/32 in 3.97 0.36 3.26 6/32 in 4.76 0.36 4.05 7/32 in 5.56 0.36 4.85 8/32 in 6.35 0.36 5.64 9/32 in 7.14 0.36 6.43 10/32 in 7.94 0.36 7.23 11/32 in 8.73 0.36 8.02 12/32 in 9.52 0.36 8.81 13/32 in 10.32 0.36 9.61 14/32 in 11.11 0.36 10.4 15/32 in 11.91 0.36 11.2 16/32 in 12.7 0.36 11.99 17/32 in 13.49 0.36 12.78 18/32 in 14.29 0.36 13.58 19/32 in 15.08 0.36 14.37 20/32 in 15.88 0.36 15.16 21/32 in 16.67 0.36 15.96 1 mm 1 0.45 0.1 2 mm 2 0.45 1.1 3 mm 3 0.45 2.1 4 mm 4 0.45 3.1 5 mm 5 0.45 4.1 6 mm 6 0.45 5.1 7 mm 7 0.45 6.1 8 mm 8 0.45 7.1 9 mm 9 0.45 8.1 10 mm 10 0.45 9.1 11 mm 11 0.45 10.1 12 mm 12 0.45 11.1 Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - K&S Precision Metals: Round brass tube (sizes and wall) — web — K&S site terms [verify license at link] — https://ksmetals.com/collections/brass-tube - Wikipedia: Brass — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Brass - Long Earth Society: Engine builds that use these parts (videos and write-ups) — web, video — LES site — https://longearthsociety.com/engineering/ Free files (CC BY 4.0, Xem Studio; STEP + STL, 32 parts): https://xemstudio.com/files/hardware/brass-tube-ks/index.json API: https://xemstudio.com/api/geometry?object=brass-tube-ks