---
product_id: 618553189
title: "twin pen st Multisystem Pen - Steel"
brand: "lamy"
price: "NT$3518"
currency: TWD
in_stock: true
url: https://www.desertcart.tw/products/618553189-twin-pen-st-multisystem-pen-steel
store_origin: TW
region: Taiwan
---

# Built-in eraser Precision 0.5mm lead Dual writing modes twin pen st Multisystem Pen - Steel

**Brand:** lamy
**Price:** NT$3518
**Availability:** ✅ In Stock

## Summary

> 🖋️ Elevate your writing game with the ultimate dual-action pen.

## Quick Answers

- **What is this?** twin pen st Multisystem Pen - Steel by lamy
- **How much does it cost?** NT$3518 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/products/618553189-twin-pen-st-multisystem-pen-steel)

## Best For

- lamy enthusiasts

## Why This Product

- Trusted lamy brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Designer Craftsmanship:** Iconic design by Gerd A. Müller blends style with professional utility.
- • **Refill-Ready Convenience:** Equipped with LAMY M 21 black ballpoint refill and HB pencil lead for immediate use and long-lasting performance.
- • **System Identification Ring:** Quickly identify your pen system at a glance—perfect for busy professionals on the go.
- • **Seamless Dual Functionality:** Switch effortlessly between smooth ballpoint ink and precise 0.5mm pencil lead for every task.
- • **Integrated Eraser Innovation:** Built-in eraser hidden under the removable button keeps your workspace clean and mistakes invisible.

## Overview

The Lamy Twin Pen St Multisystem Pen in steel combines a ballpoint pen and a 0.5mm propelling pencil in one sleek tool, featuring a built-in eraser beneath a removable button and designed by Gerd A. Müller for professional precision and style.

## Description

Product Description               LAMY twin pen – Brilliantly versatile. As beautiful as it is practical: the LAMY tri pen. You have a ballpoint pen, mechanical pencil and a marker all in one writing instrument – and your work under control in no time at all.  Flexibility and mobility have become key terms in our modern working world. And the number of people who no longer work at one fixed place, but who move from project to project is growing. In changing teams and often in different towns and cities.   And their writing instruments? Ideally, they come from Lamy, are called the LAMY twin pen, LAMY tri pen or LAMY4pen and with these illustrative names signal that behind their slim shapes there is more concealed than just a ballpoint pen or a  propelling pencil.   They are particularly high-quality multi-system writing instruments, a speciality of Lamy, so that, wherever you are, at whatever time, you will always have the right writing system to hand.  Designer: Gerd A. Müller                   Set Contains:               LAMY twin pen st steel multisystem pen

## Features

- With system identification ring and built-in eraser (LAMY Z 15) underneath the removable button.
- Fitted with ballpoint pen refill LAMY M 21 black and propelling pencil lead 0.5 (LAMY M 41) HB.
- Designer: Gerd A. Müller

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | LAMY |
| Brand | Lamy |
| Item Weight | 0.988 ounces |
| Product Dimensions | 5.67 x 0.39 x 0.39 inches |
| Item model number | Twin pen 645 |
| Is Discontinued By Manufacturer | No |
| Color | Stainless Steel |
| Closure | Twist |
| Grip Type | Knurled |
| Pencil Lead Degree (Hardness) | HB |
| Material Type | Stainless Steel |
| Number of Items | 1 |
| Size | 1 Count (Pack of 1) |
| Point Type | Fine |
| Line Size | 0.5 |
| Ink Color | Blue,Green,Red,Black |
| Manufacturer Part Number | 1204340 |

## Product Details

- **Brand:** Lamy
- **Writing instrument form:** Multifunction Writing Instruments
- **Colour:** Black
- **Ink colour:** Black
- **Age range (description):** Adult

## Images

![twin pen st Multisystem Pen - Steel - Image 1](https://m.media-amazon.com/images/I/61rFWLL7m-L.jpg)

## Available Options

This product comes in different **Pattern Name, Color** options.

## Frequently Bought Together

- LAMY Multi Function Pen st Twin Pen, Stainless Steel, L645
- Lamy Lead Refill - .05 mm HB (12 Pcs) M41
- LAMY Multi-functional Pen st Tri-Pen, Matte Black, L746

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**Shop now:** [https://www.desertcart.tw/products/618553189-twin-pen-st-multisystem-pen-steel](https://www.desertcart.tw/products/618553189-twin-pen-st-multisystem-pen-steel)

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*Product available on Desertcart Taiwan*
*Store origin: TW*
*Last updated: 2026-01-24*