Start with the inner diameter (ID) your application requires, then add twice the wall thickness to get the outer diameter (OD). For example, if you need a 23mm ID passage with a 1mm wall, select OD 25mm × ID 23mm. Wall thickness generally ranges from 0.5mm (≈0.020") for lightweight applications up to 5mm (≈0.197") for structural use.

Brass (typically C26000 / cartridge brass or equivalent) generally has a tensile strength of around 300–500 MPa depending on temper. Thicker walls provide greater load-bearing capacity. For structural or pressure-bearing applications, please confirm the alloy grade and consult an engineer.

Brass offers good corrosion resistance in most indoor and mildly humid outdoor environments. It is generally suitable for decorative outdoor use, light plumbing fittings, and marine-adjacent applications. For prolonged saltwater or highly corrosive exposure, a protective lacquer or sealant coating is recommended.

Yes. The OD dimensions follow standard metric sizing (21–30mm), making them compatible with most metric compression fittings, couplings, and sleeves. Always verify the exact OD and ID of your fitting before ordering, as tolerances can vary by manufacturer.

Yes. Brass is one of the most machinable metals available. These tubes can typically be cut with a pipe cutter or hacksaw, soldered with standard lead-free solder, drilled, tapped, and turned on a lathe. Deburr cut ends before assembly for a clean fit.

Divide millimeters by 25.4 to get inches. Quick reference: 21mm ≈ 0.827", 25mm ≈ 0.984", 30mm ≈ 1.181". The 500mm length equals approximately 19.7" (≈19-11/16").

For decorative, craft, or model-making applications, 0.5mm–1mm wall thickness is generally sufficient and keeps weight low. For light structural, plumbing, or mechanical applications, 1.5mm–2mm is a common choice. For higher-pressure or load-bearing scenarios, 3mm–5mm walls provide added rigidity and durability.