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Evergreen Styrene Tube #230: 5/16-Inch Sizing & Use Guide

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Evergreen Scale Models styrene tube item 230, 5/16-inch outside diameter

The Evergreen Scale Models Styrene Tube #230 is a scratchbuilding material listed as three 14-inch tubes with a 5/16-inch outside diameter. It is intended for measured model-building and fabrication work where round hollow styrene stock is appropriate.

Verified product identity

  • Manufacturer: Evergreen Scale Models.
  • Item number: 230.
  • Store SKU: EVG230.
  • Material: Styrene.
  • Outside diameter: 5/16 inch, also listed as .312 inch.
  • Length: 14 inches per tube.
  • Quantity stated by the product title: Three tubes.

The current verified price is $7.18 before shipping and applicable tax.

Dimensions that are not yet published

The current store record does not state the inside diameter, wall thickness, exact tolerances or whether another Evergreen rod or tube nests inside it. Do not purchase it as a sleeve, bearing or telescoping fit based only on the 5/16-inch outside diameter.

When an inside fit matters, verify Evergreen’s current specification or measure the actual material before cutting the final project parts.

Possible scratchbuilding uses

Round styrene tube can be useful for model structures, ducts, exhaust components, sleeves, columns, piping and custom mechanical details. The correct use depends on scale, wall thickness, load and the visual reference for the project.

The product is hobby material, not a structural or pressure-rated tube. Do not use it for plumbing, compressed air, fuel or safety-critical applications.

Measuring before cutting

  1. Confirm the project requires a 5/16-inch outside diameter.
  2. Measure the needed length and mark around the tube so the cut stays square.
  3. Allow extra material for trimming and final fitting.
  4. Test the fit before producing duplicate pieces.
  5. Deburr and square the cut ends as required by the model.

A sharp hobby tool, fine saw or tubing-cutting method may be appropriate depending on the project and builder experience. Follow tool safety instructions and support the tube so it does not crush or split.

Joining and finishing styrene

Choose an adhesive specifically suitable for styrene and the other material being joined. Solvent-type styrene cement and general adhesives behave differently, so test on scrap first. Keep adhesive away from visible surfaces where it could soften detail.

Clean the material before priming or painting, and use coatings compatible with styrene. The product listing does not include cement, primer, paint or tools.

Tube versus strip stock

Gift guidance

This is a good project-specific gift for a scratchbuilder who has requested Evergreen 230 or needs 5/16-inch styrene tube. It is difficult to buy accurately without project measurements, so a general gift buyer should ask for the item number rather than guessing a diameter.

Frequently asked questions

What is the outside diameter?

5/16 inch, also stated as .312 inch.

How long is each tube?

The product title states 14 inches.

How many tubes are listed?

Three.

What is the inside diameter?

It is not published in the current store record.

Are glue and paint included?

No. This listing is for the styrene tube material.

Review the live Evergreen #230 listing · Browse model-building supplies · Read the Vallejo paint guide

Verified October 15, 2026. The live product page and Evergreen’s current specifications control exact dimensions, tolerances and package contents.