# Cylinder lock insert with knob GERDA GAŁKA 30-40 mm brass

**URL:** https://aio.lv/en/product--gerda-wke1g03040mos--12013876
**Data updated:** 2026-03-11 20:48 (EET)
**Category:** Other goods
**Manufacturer:** GERDA
**Manufacturer code:** WKE1G03040MOS
**EAN:** 5907620082971
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 19.49 €
**Prices and availability valid until:** 2026-08-04 23:59
**Price without VAT (21%):** 16.11 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--gerda-wke1g03040mos--12013876

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 23.07.2026 | free |
| Pickup points | 28.07.2026 | 1.89 EUR |
| Courier delivery to door | 28.07.2026 | 4.99 EUR |

## Summary description

GERDA GAŁKA cylinder insert with knob, size 30–40 mm, brass finish. Designed as a lock cylinder component for doors where a knob-operated inner side is required. Provides mechanical access control as part of a door locking system; suited for residential and commercial entrance or interior doors that accept a 30–40 mm cylinder. Easy to install as a replacement or upgrade.

## Long description

GERDA GAŁKA cylinder lock insert with knob in brass finish is a mechanical door lock cylinder designed for doors that require knob operation on the interior side. The insert fits cylinders with an overall size range of 30–40 mm and serves as a component of a locking system to allow key access from the outside and knob operation from the inside. It is intended for use as a replacement part or an upgrade when converting a standard cylinder to a knob-operated version.
Advantages
The brass finish offers corrosion resistance and a consistent appearance that matches traditional door hardware. The knob-equipped insert simplifies operation from the inside, enabling quick locking and unlocking without a key while maintaining secure keyed access from the exterior. The unit is compact and compatible with doors that accept a 30–40 mm cylinder, allowing straightforward installation in common residential and commercial door lock assemblies.
Suitable for
Entrance doors where interior knob operation is preferred
Interior doors that require keyed access from one side
Replacement or retrofit of existing cylinder locks sized 30–40 mm
Residential and light commercial properties
Key specifications
Type: Cylinder lock insert with interior knob
Size compatibility: 30–40 mm overall cylinder length
Finish: Brass
Operation: Keyed access from exterior, knob operation from interior
Application: Mechanical access control for door lock units
How to use
Measure the existing cylinder length to confirm compatibility with a 30–40 mm insert before starting. Remove the existing cylinder according to the door lock manufacturer’s instructions, insert the GERDA GAŁKA cylinder insert into the lock case and secure it following the lock manufacturer's fastening method. From the interior side the knob provides manual rotation to lock and unlock; from the exterior, operate using the matching key. Ensure the cylinder is correctly aligned and that the door operates smoothly after installation.
Usage recommendations
For reliable performance, verify compatibility with your door and lock hardware prior to purchase. If uncertain about removal or installation procedures, consult a qualified locksmith or refer to the door lock manufacturer’s guidelines. Periodically inspect and lubricate the cylinder with a graphite or silicone-based lubricant suitable for locks to maintain smooth operation and reduce wear.

## FAQ

### How much does the Cylinder insert with knob GERDA GAŁKA 30-40 mm cost, and is it available for purchase?

The price is 19.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 5 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 23.07.2026 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 GERDA 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 GERDA 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/12013876/67502736_large.webp