Rectangular tube insert 18×30 mm, white

The white Rectangular tube insert is a finishing component that closes the open end of a hollow tube. The internal section slides into the tube, while the flat external flange covers the edge of the cut end.

Inserts of this type are used to protect tube ends from dirt and prevent contaminants from entering, as well as to provide a neat finish to visible edges. This keeps tube ends in support structures, frames and stands looking tidy while covering sharp cut edges.

When choosing an insert, match it to the nominal tube dimensions and wall thickness. Polyethylene is commonly used for this type of insert: it is lightweight and moisture-resistant, and the push-in installation requires no additional fasteners.

Push-in inserts with ribbed internal sections are suitable for finishing steel and aluminium tubes in furniture, stands, railings, fences and support structures. They are sold individually, making it easy to order exactly the quantity required for a project.

The insert consists of a flat external section and a ribbed internal section that grips the tube wall. The full dimensional specification is provided in the tables below.