Fountain pen with frosted ink bag refill system, 13.8 cm plastic barrel, available in 0.38 mm and 0.5 mm nib sizes for precise writing, choice of black or blue barrel colours
Frosted Ink Bag Fountain Pen with 0.38mm or 0.5mm Nib Choice in Black or Blue

This fountain pen centres on a frosted ink bag refill system, a design that houses a replaceable ink cartridge within the pen's barrel. It is offered with a choice between a 0.38 mm nib for finer lines or a 0.5 mm nib for a broader stroke, allowing you to select the tool that best suits your handwriting or drawing needs. The pen's body is made from plastic, resulting in a lightweight instrument that measures 13.8 cm in length and 1.1 cm in diameter, providing a standard-sized grip. Available in either black or blue, the pen offers a simple colour option. The source specification provides these concrete measurements and options without additional claims on durability, ink flow, or material quality.
Features and Construction

The pen's design is defined by several key, measurable features derived from the provided specifications. Its construction and size are clearly stated, allowing for an objective assessment of its physical form and functional options.
Material and Build
The barrel of the fountain pen is constructed from plastic. This material choice typically contributes to a lighter overall weight compared to metal-bodied pens, which can be beneficial for prolonged writing sessions. The source text describes the material as 'plastic' without further qualification regarding type, grade, or specific properties such as impact resistance or finish longevity. The frosted ink bag refers to the internal refill system, implying the use of a standard proprietary ink cartridge that is accessed and replaced from within the barrel.
Size and Practical Fit
The pen has defined dimensions: a total length of 13.8 cm and a barrel diameter of 1.1 cm. This places it within the common size range for standard fountain pens, suggesting it should fit comfortably in most hands and standard pen holders or cases. The 1.1 cm diameter indicates a moderately sized grip section. These precise measurements allow you to gauge the pen's size accurately before purchase.
Uses and Placement

With its choice of nib sizes and straightforward refill system, this pen fits into various writing contexts. Its standard dimensions and plastic construction make it suitable for both organised and casual use.
Event or Professional Use
The availability of two nib sizes extends its utility. The 0.5 mm nib could be suitable for general note-taking, signing documents, or journaling where a clearer, more pronounced line is desired. The 0.38 mm nib option caters to tasks requiring finer detail, such as annotating documents, intricate sketching, or writing in smaller notebooks where space is limited. The simple black or blue colour options offer a professional and understated appearance.
Everyday Home Use
For personal use at home, this fountain pen can serve as a daily writing instrument for lists, correspondence, or creative pursuits. The frosted ink bag system suggests a refill process that may be simpler than piston or converter systems for some users, involving the replacement of a pre-filled cartridge. The plastic build likely makes it a practical choice for general use without concern for excessive weight.
Benefits and Buying Value
The value of this pen lies in its clearly stated options and specifications, allowing you to make an informed choice based on nib size and colour preference.
Reuse and Low Maintenance
The core reusable element is the frosted ink bag refill system itself. Once the initial ink supply is depleted, the pen is designed to be refilled by replacing the internal cartridge, extending the life of the pen body and nib. Maintenance is centred on this cartridge swap and general care to keep the nib clean. No specialised cleaning routines or tools are indicated by the source text.
Why Choose This Product
You might select this fountain pen if your primary requirements are a choice between a 0.38 mm or 0.5 mm writing line and a preference for a black or blue barrel. The clearly provided dimensions (13.8 cm length, 1.1 cm diameter) allow you to assess its size against your comfort preferences. The value is in the concrete options presented—nib size and colour—supported by the specified refill system and material, without unsupported claims about performance or longevity.