Seldén mast section names are more than catalogue labels: they help identify the extrusion family, dimensions and the generation of compatible fittings. Understanding the section designation makes it much easier to search for parts or compare a replacement mast.
Conventional and furling mast families
What a designation such as C126 means
Section length
The numeric designation corresponds closely to the fore-and-aft section dimension for many current C-sections.
Section width
The width is a separate measurement. A C126 is not simply a 126 mm round or square tube.
Section shape
The aft face, luff groove and extrusion geometry matter when identifying sliders, fittings and compatible components.
Mast ID
Since 1992 Seldén has engraved a unique mast ID at the lower end of aluminium mast sections; the ID includes the section designation.
Why the generation matters
A section family name can span more than one generation. Seldén's current documentation distinguishes older and newer C and F ranges. Components should therefore be checked against the individual mast rather than selected from the letter and approximate dimensions alone.
Examples of current C-section dimensions
Seldén's sailmaker information lists sections such as C106, C116, C126 and C139 with increasing fore-and-aft dimensions. The section width and luff-groove arrangement also change, which is why both dimensions and the mast ID should be recorded when looking for spares.
How to identify an unknown section
- Photograph the complete mast ID.
- Measure the fore-and-aft section length.
- Measure the athwartships section width.
- Photograph the extrusion profile.
- Photograph the heel, masthead, spreader brackets and gooseneck.
Need to identify a Seldén mast section?
Send us the complete mast ID and section measurements. We can use those details to narrow the section family and the appropriate spare-parts route.