Our ballpoint pen refills with black ink, suitable for any type of CROSS ballpoint pen, suitable for 8513 refills. We use high-quality fast drying ink to ensure that your writing is as smooth as possible, without fading, spilling, and staining, which also helps keep your hands and cuffs clean. The ball point pen has a length of 7CM and is made of stainless steel, which is sturdy and durable. This size is compatible with any type of CROSS pen that fits 8513 ink refills. They are simple and fast to use, saving you time and energy. Fill up your favorite pen and it will be ready to use immediately. Refills comes in several different sizes, so whether you buy them for yourself, your office, school, or your classroom, we have a set that meets your needs. features: Black ballpoint pen ink refill Compatible with any type of CROSS ballpoint pen suitable for 8513 refills Convenient and fast to use, without spillage or fading Quickly dry ink to prevent stains and provide a smooth writing experience Lightweight and easy to operate Approximate size: 7CM Available in 20 sets Suitable for private use, businesses, and schools