# Hardtube fitting set OPTIMUS for 12 mm tubing, 6-pack with installation tool, black

**URL:** https://aio.lv/en/product--optimus-op-fit-hard-12mm-black-6pack--11866892
**Data updated:** 2026-03-09 17:44 (EET)
**Category:** CPU Coolers & PC Cooling Systems
**Manufacturer:** OPTIMUS
**Manufacturer code:** OP-FIT-HARD-12MM-BLACK-6PACK
**EAN:** 850015187308
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 91.49 €
**Prices and availability valid until:** 2026-08-14 23:59
**Price without VAT (21%):** 75.61 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--optimus-op-fit-hard-12mm-black-6pack--11866892

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 05.08.2026 | free |
| Pickup points | 10.08.2026 | 1.89 EUR |
| Courier delivery to door | 10.08.2026 | 4.99 EUR |

## Summary description

OPTIMUS hardtube fitting set for 12 mm rigid tubing includes six fittings and a dedicated installation tool in black finish. Designed for secure connections in liquid cooling and custom tubing systems, the fittings suit straight runs and angled joins where 12 mm hard tubing is used. Practical for PC water-cooling builders, maintenance and upgrades.

## Long description

OPTIMUS hardtube fitting set for 12 mm tubing contains six precision fittings and a dedicated installation tool in a black finish. The set is engineered for secure, leak-resistant connections with 12 mm rigid (hard) tubing in liquid-cooling loops and custom cooling systems. Components are sized to match 12 mm outer-diameter hard tubes and are intended to simplify assembly, maintenance and upgrades for PC water-cooling systems and similar applications.
Advantages
The fittings provide a stable mechanical connection for rigid tubing, reducing the risk of movement-related leaks and maintaining consistent flow paths. The included installation tool streamlines the fitting process, ensuring proper seating and alignment of the tube into each connector. The black finish offers a neutral aesthetic that integrates with a range of system styles while providing durable surface protection.
Suitable for
Assembling or upgrading PC liquid-cooling loops using 12 mm hard tubing
Custom liquid-cooling projects requiring several fittings for multiple runs
Maintenance tasks where reliable tube reconnection and leak prevention are needed
Systems where a black visual finish is preferred for component uniformity
Key specifications
Fits rigid tubing with 12 mm outer diameter
Set contains six fittings and one installation tool
Material: metal construction with protective black finish (visual and corrosion resistance)
Connection type: compression-style hardtube fittings designed for secure mechanical grip
Suitable for liquid-cooling applications at typical PC operating pressures and temperatures
How to use
Prepare the 12 mm hard tubing by cutting square and deburring the end to ensure a clean, flat surface. Slide the fitting components onto the tube as required by the fitting design, then insert the tube into the receiving port until fully seated. Use the supplied installation tool to apply even pressure and confirm correct engagement between tube and fitting. After installation, visually inspect each connection and perform a pressure or leak test according to your system maintenance routine before powering the system.
Usage recommendations
Use appropriate cutting and deburring tools for 12 mm hard tubing to avoid damaging the tube bore or outer surface. Always perform a controlled leak test after assembly and follow coolant manufacturer's guidelines for compatibility with metal fittings and finishes.

## FAQ

### How much does the Hardtube Fitting Set OPTIMUS 12 mm, 6-pack cost, and is it available for purchase?

The price is 91.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 3 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 05.08.2026 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, Installment. All transactions are 100% secure and encrypted.

### Can Hardtube Fitting Set OPTIMUS 12 mm, 6-pack be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### 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 OPTIMUS 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 OPTIMUS 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/11866892/67271666_large.webp