The 40 x 40mm square tube is the most popular square profile in the Balustrader range, striking the ideal balance between visual weight and practicality. Substantial enough to serve as a structural top rail or upright post, yet refined enough not to overpower the overall design, this is the go-to square tube for the majority of residential balustrade projects across South Africa.
Its clean, equal-sided geometry creates crisp horizontal and vertical lines that suit modern, minimalist, and transitional home designs alike. It is widely used as a top rail above horizontal tube infill, as an intermediate horizontal rail, or as a structural upright in combination with our pre-drilled post range.
Compatible with our full range of matching 40 x 40mm square end caps and post converters, allowing posts and rails to be neatly finished at every termination point.
Specifications
- Profile: Square
- Dimensions: 40 x 40mm
- Length: 5.8m per piece
- Wall Thickness: 1.2mm
- Finish Options: Brushed Satin | Mirror Polish
- Grade Options: 304 Stainless Steel | 316 Marine Grade Stainless Steel
- Material: Stainless Steel
- Category: Stainless Steel Tubing – Square
Which Grade Should I Choose?
Grade 304 is strong and reliable, suited to internal applications and external use in non-coastal, non-corrosive environments — ideal for inland areas such as Johannesburg, Pretoria, and most non-coastal suburbs.
Grade 316 (Marine Grade) offers superior corrosion resistance and is the essential choice for coastal properties, poolside installations, and any environment exposed to salt air, moisture, or chemicals. If you are in Cape Town, the Winelands, Durban, or any coastal area, Grade 316 is strongly recommended.
Tube Rolling & Fabrication
Our tube rolling service is available in-store at our Cape Town workshop. We can roll tubing to your required radius — ideal for curved handrails, sweeping deck railings, and architectural features. Round and slotted round tubing roll cleanly in most configurations. Square, rectangular, and slotted square or rectangular profiles can also be rolled, however these shapes are more complex and results will depend on the specific radius and application required — our team will advise you before proceeding. Contact us or submit a DIY Guidance request to discuss your project.
Not Sure What You Need?
Submit a free DIY Guidance request and one of our experts will review your project and confirm the exact products and quantities to order before you spend a single rand.
| Grade & Finish | 304 – Brush, 304 – Mirror, 316 – Mirror |
|---|---|
| Type | No Weld, Weld |
| Size | 40 x 40mm |
| Length | 5.8m |
| Material | Stainless Steel |
| Shape | Square |
| Thickness | 1.2mm |
