# InLine Fiber Optical Adapter Metal Duplex ST/ST MM Ceramic Sleeve with Flange

**URL:** https://aio.lv/en/product--inline-89990c--1039022
**Data updated:** 2026-01-03 12:46 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** InLine
**Manufacturer code:** 89990C
**EAN:** 4043718194834
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 7.49 €
**Prices and availability valid until:** 2026-07-05 23:59
**Price without VAT (21%):** 6.19 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--inline-89990c--1039022

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 30.06.2026 | free |
| Pickup points | 03.07.2026 | 1.99 EUR |
| Courier delivery to door | 03.07.2026 | 4.99 EUR |

## Summary description

The InLine Fiber Optical Adapter features a metal duplex design with ST/ST connectors, ensuring reliable connections for multimode applications. It includes a ceramic sleeve for enhanced durability and performance. The adapter is easy to install and is ideal for various networking setups, providing a secure and stable connection. Its silver color adds a professional touch to your installations.

## Long description

InLine Fiber Optical Adapter Metal Duplex ST/ST MM Ceramic Sleeve with Flange is a metal duplex adapter designed for ST-to-ST multimode fiber connections. The adapter uses a ceramic alignment sleeve to improve durability and optical performance and comes with a flange for straightforward panel or chassis installation. Its silver finish suits professional networking environments and helps provide stable, low-loss connections in multimode applications.
Advantages
The metal duplex construction ensures mechanical strength and grounding where required, while the ceramic sleeve maintains precise fiber alignment for consistent signal transmission. The included flange simplifies mounting in racks, panels or enclosures, and the ST/ST interface provides wide compatibility with standard multimode transceivers and patch cords.
Suitable for
 Multimode fiber optic patch panels and distribution frames
 Chassis or wall-mount enclosures requiring ST connections
 Network installations needing durable, panel-mounted duplex adapters
Key specifications
 Type: Metal duplex fiber optic adapter
 Connector interface: ST/ST
 Fiber mode: Multimode (MM)
 Sleeve material: Ceramic (precision alignment)
 Mounting: Flange for panel/chassis installation
 Color: Silver
 Brand: InLine
 MPN: 89990C
 EAN: 4043718194834
How to use
Mount the adapter to a compatible panel or chassis using the flange and appropriate screws. Insert ST multimode patch cords into each ST port until the bayonet latches engage. Ensure fiber ends are clean and inspected before mating to minimize insertion loss. For removal, depress the bayonet latch and withdraw the connector straight out.
Usage recommendations
Use with clean, inspected multimode ST patch cords and follow standard fiber handling procedures. Avoid excessive bending of connected fibers and secure cables to prevent strain on the adapter. For best performance, periodically clean the ceramic sleeve and connector endfaces with recommended fiber cleaning tools.

## Specifications

| Feature | Value |
|---|---|
| Product colour | Silver |
| Housing material | Ceramic, Metal |
| Connector 1 | ST female |
| Connector 2 | 2 x ST |
| Connector 1 gender | Female |
| Connector 2 gender | Female |

## FAQ

### How much does the Fiber Optical Adapter InLine 89990C cost, and is it available for purchase?

The price is 7.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 692 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 30.06.2026 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 InLine 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 InLine 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

### Where can I download the instructions for Fiber Optical Adapter InLine 89990C?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/1039022/64125163_large.webp