These patent pending removable sublimation pen blanks are made of quality stainless steel and are lightweight and durable, with smooth surfaces, comfortable to hold and use, easy for you to carry and store, and you can put one in your pocket for instant use. The ballpoint of the blank heat transfer gel pen is smooth and full of black ink for a satisfying writing experience. The seamless design on the exterior, we make it easy for crafters to design & build the perfect pen for gifting. QUICK-DRYING INK: These pens come with quick-drying ink to prevent smearing & smudging, allowing a smooth, neat, and clean writing experience. Whether in school, college, or professional space, quick-drying ink is desirable for people from all walks of life. CUSTOMIZATION: The patent pending removable chamber design allows the pens to be easily customized. You can have the recipient's name, initials, a special date, or a meaningful message engraved on the pen barrel. This adds a personal touch and makes the pen a truly one-of-a-kind gift. HIGH-QUALITY CONSTRUCTION: This pen has an interchangeable chamber for easy personalization. It makes it easier to add more designs for existing pens. The 0.5MM Black gel ink helps write smoothly and effortlessly and dries quickly. These stainless steel pens have a screen stylus click tip and are packed in our signature MakerFlo silver packaging. SIZE INFORMATION: Each blank heat transfer gel pen chamber measures approximately 4.75 inches long and has a diameter of approximately 0.42 inches for a firm and comfortable grip. Buy additional chambers separately to make more designs that can be changed onto the pen in seconds.