# Ruler Tetis 20 cm aluminium blue — Tetis BL040-NB, single piece

**URL:** https://aio.lv/en/product--tetis-bl040-nb--12000633
**Data updated:** 2026-04-21 16:20 (EEST)
**Category:** Rulers, Stencils & Compasses
**Manufacturer:** Tetis
**Manufacturer code:** BL040-NB
**EAN:** 5906858029727
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 5.99 €
**Prices and availability valid until:** 2026-07-21 23:59
**Price without VAT (21%):** 4.95 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--tetis-bl040-nb--12000633

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 15.07.2026 | free |
| Pickup points | 20.07.2026 | 1.89 EUR |
| Courier delivery to door | 20.07.2026 | 4.99 EUR |

## Summary description

Aluminium 20 cm ruler by Tetis (model BL040-NB) in blue finish. This single-piece measuring tool provides a rigid, durable straight edge for drawing, measuring and cutting guidance. Compact 20 cm length makes it suitable for school, office, drafting and light workshop tasks where accurate short measurements and stable alignment are required.

## Long description

Aluminium 20 cm ruler by Tetis in blue finish offers a compact, rigid straight edge for drawing, measuring and guiding cuts. The single-piece aluminium construction gives consistent straightness and durability while the 20 cm length makes the ruler easy to carry and store. Its slim profile and stable edge are suitable for everyday use at school, in the office, in drawing tasks and for light workshop work requiring short, accurate measurements and alignment.
Advantages
The aluminium body provides a firm, non-flexing edge that resists warping and maintains accuracy over time. The blue finish reduces glare and highlights measurement marks for easier reading. Lightweight construction balances portability with robustness, and the single-piece design eliminates joints that can shift or loosen. The 20 cm size is practical for precision on smaller sheets and for use with notebooks, sketchpads and cutting mats.
Suitable for
School assignments and classroom geometry
Office measuring and layout tasks
Drafting, sketching and technical drawing
Guiding blades for light cutting and trimming
Hobby and DIY projects requiring short, straight edges
Key specifications
Material: aluminium
Length: 20 cm
Finish: blue
Construction: single-piece rigid profile
Edge: straight, slim profile for precise alignment
How to use
Place the ruler along the line you want to draw, measure or cut so the straight edge aligns with your reference points. Hold the ruler firmly with one hand to prevent slipping while drawing or marking with a pencil or pen. When guiding a cutter, apply steady pressure against the ruler edge and use short, controlled strokes; always cut away from your body and use an appropriate cutting mat or surface underneath. Store the ruler flat or in a protective sleeve to avoid bending or scratching the edge.
Usage recommendations
For reliable measurements, ensure the ruler lies flat against the work surface and that marks are viewed perpendicular to the scale to avoid parallax error. Clean the edge and measurement marks occasionally with a soft cloth to maintain visibility. For cutting tasks, pair the ruler with a sharp blade and a non-slip mat to improve safety and accuracy.

## FAQ

### How much does the Tetis 20 cm aluminium ruler BL040-NB cost, and is it available for purchase?

The price is 5.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 7 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 15.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Tetis products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Tetis service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/12000633/67455823_large.webp