Keep your favourite energel pens writing smoothly with this convenient pack of three high quality 0.7mm gel pen refills in black ink. These refills are compatible with a wide range of energel pens, including the bl107, bl77, bl57, bl437r1, as well as the sterling symphony and excel gift pens. Designed to deliver a smooth, consistent ink flow, these refills ensure a seamless writing experience, perfect for everyday use, note taking, or professional writing.the 0.7mm tip provides a medium line thickness, ideal for clear, legible writing. Whether you're replacing an old refill or stocking up for the future, this pack of three refills is the perfect solution for keeping your cherished energel pens in action.. Pack of 3 high quality 0.7mm black gel ink refills. Compatible with a wide range of energel pens bl107, bl77, bl57, bl437r1, sterling symphony, excel gift pens. Delivers smooth, consistent ink flow for a seamless writing experience. Medium line thickness 0.7mm for clear, legible writing. Ideal for everyday use, note taking, and professional writing