---
product_id: 48686327
title: "8 x Schmidt 635M Mini Ball Pen Refill - Black - (Lamy M21 and Cross 8518-4 Compatible)"
brand: "lamy"
price: "€ 24.63"
currency: EUR
in_stock: true
reviews_count: 13
category: "Lamy"
url: https://www.desertcart.pt/products/48686327-8-x-schmidt-635m-mini-ball-pen-refill-black-lamy
store_origin: PT
region: Portugal
---

# Compact 2.75" refill size Rich black ink for crisp lines Medium nib for smooth writing 8 x Schmidt 635M Mini Ball Pen Refill - Black - (Lamy M21 and Cross 8518-4 Compatible)

**Brand:** lamy
**Price:** € 24.63
**Availability:** ✅ In Stock

## Summary

> 🖊️ Never miss a stroke—write your success story in bold black.

## Quick Answers

- **What is this?** 8 x Schmidt 635M Mini Ball Pen Refill - Black - (Lamy M21 and Cross 8518-4 Compatible) by lamy
- **How much does it cost?** € 24.63 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/48686327-8-x-schmidt-635m-mini-ball-pen-refill-black-lamy)

## 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

- • **Bulk Value Pack:** 8-pack refills keep you stocked and ready, so you never run out during critical moments.
- • **Premium Ink Quality:** Deep black ink ensures your writing stands out with sharp, professional clarity every time.
- • **Effortless Precision:** Medium ballpoint nib delivers consistent, smooth ink flow for flawless note-taking and signing.
- • **Trusted Brand Assurance:** Manufactured by Schmidt in the UK with a product warranty and 4.6-star rating from 791 users.
- • **Universal Compatibility:** Seamlessly fits Lamy M21, Cross 8518-4, and select Swarovski pens—upgrade your favorite pen instantly.

## Overview

The Schmidt 635M Mini Ball Pen Refill is a premium medium-point black ink refill compatible with Lamy M21, Cross 8518-4, and some Swarovski pens. Measuring just under 2.75 inches, this 8-pack offers smooth, consistent writing with rich black ink, backed by a trusted UK manufacturer and highly rated by professionals.

## Description

Schmidt prints the distributors name "PRIVATE RESERVE" on the outside barrel of some of the refills we ship. Compatible with LAMY M21, Cross 8518-4, and some Swarowski Pens (please check to see if your pen will use this refill).

Review: Pen refills - A very good product and fair price
Review: Swarovski pen refills - Fits perfectly. Good value for money.

## Features

- Schmidt 635M MINE MEDIUM Ballpoint Ink Refill w/ Plastic Cap 8-Pack
- Ink Color: BLACK (also available in BLUE ~ RED & GREEN)
- The refill measures 2-11/16" in length (not including the plastic CAP)
- Measurement with CAP: 2-3/4" (depending on how far u insert in cap)
- Writing Nib: MEDIUM

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B008B2EQEU |
| Best Sellers Rank | 24,216 in Stationery & Office Supplies ( See Top 100 in Stationery & Office Supplies ) 231 in Pen Refills |
| Brand | Lamy |
| Brand Name | Lamy |
| Country Of Origin | Germany |
| Customer Reviews | 4.6 out of 5 stars 794 Reviews |
| Ink Colour | Black |
| Item Dimensions | 10.2 x 5.1 x 0.3 centimetres |
| Item Weight | 0.02 Pounds |
| Item dimensions L x W x H | 10.2 x 5.1 x 0.3 centimetres |
| Item weight | 0.02 Pounds |
| Manufacturer | Schmidt |
| Manufacturer Part Number | LMY_8518-4 |
| Model Number | LYSB008B2EQEU-ELECTRNCS |
| Number of Pieces | 8 |
| Number of pieces | 8 |
| Package Size Name | 8-Pack |
| Point Type | Medium |
| Point type | Medium |
| Product Warranty | yes |
| Style | Ballpoint |
| UPC | 080333635124 |
| Unit Count | 8 count |

## Product Details

- **Brand:** Lamy
- **Item dimensions L x W x H:** 10.2 x 5.1 x 0.3 centimetres
- **Item weight:** 9 g
- **Number of pieces:** 8
- **Style:** Ballpoint

## Images

![8 x Schmidt 635M Mini Ball Pen Refill - Black - (Lamy M21 and Cross 8518-4 Compatible) - Image 1](https://m.media-amazon.com/images/I/81CU8N6D1LL.jpg)
![8 x Schmidt 635M Mini Ball Pen Refill - Black - (Lamy M21 and Cross 8518-4 Compatible) - Image 2](https://m.media-amazon.com/images/I/71fxRVQoz7L.jpg)
![8 x Schmidt 635M Mini Ball Pen Refill - Black - (Lamy M21 and Cross 8518-4 Compatible) - Image 3](https://m.media-amazon.com/images/I/91ux0iAln9L.jpg)

## Questions & Answers

**Q: Does it fit Swarovski Stardust pens?**
A: I don't know about the Stardust pens but I know it fits the Swarovski Lady Crystalline pens.

**Q: If you have tried this refill with a livescribe pen, does it fit/mod? (livescribe refills are about 2.25 inches long x ~2.5mm wide)**
A: Tested: fits nicely and the Livescribe 3 pen also recognizes the ink when writing.

**Q: Is there a fine point version?**
A: The refills I received, both blue and black, were medium point.

**Q: Is this refill as pictured with just the silver tip only or is the product received the silver and black tip refill?**
A: Normally the tip color will correspond to the ink color.  In this case the tips should be black.  Jim

## Customer Reviews

### ⭐⭐⭐⭐⭐ Pen refills
*by A***R on 29 April 2026*

A very good product and fair price

### ⭐⭐⭐⭐⭐ Swarovski pen refills
*by G***E on 9 March 2026*

Fits perfectly. Good value for money.

### ⭐⭐⭐⭐ Glad I found these
*by J***N on 17 March 2014*

I was given the pen as a gift and I loved it. Glad I came across these refills as the pen had run out of ink and I thought I wasn't going to be able to use it! These refills are perfect and will last a long time.

## Frequently Bought Together

- 8 X Schmidt 635M Mini Ball Pen D1 size Refills – BLACK Ink and one removable black end cap
- Schmidt 635 Mini D1 Ballpoint Refill Medium, 4 Pack, Blue (SC58150)
- Zebra 0.5mm Royal Blue Gel Ink Refill (RJSB5- RBL), for Zebra Multi Function Pen Shabo X Ballpoint Pen, × 5 Pack/total 5 pcs (Japan Import) [Komainu-Dou Original Package]

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.pt/products/48686327-8-x-schmidt-635m-mini-ball-pen-refill-black-lamy](https://www.desertcart.pt/products/48686327-8-x-schmidt-635m-mini-ball-pen-refill-black-lamy)

---

*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-10-03*