Universal : Measuring 98mm (3.86 inch) in length with 1mm tip,this ink pen refills is sized to fit a wide range of retractable ballpoint pens. Please measure your current refill before purchasing to confirm . Effortless: Experience exceptionally smooth writing. Durable tungsten caroffere ball ensures the ink flows consistently,glide after glide,without any skipping. Quick-Drying & Smudge-Proof Ink: Our fast-drying ink prevents smearing and messy hand stains. it allows you to write,highlight,or turn the page immediately without any worries. Built to Last: Crafted with robust stainless steel nib,engineered to withstand daily heavy use without wearing down. Making it a long-lasting writing companion. Cost-Effective Value Pack: Breathe new life into your favorite pens. This convenient pack of 12 refills offers incredible value,ensuring you always have a spare on hand for home,office,or school use..