These waterproof pens feature wear-resistant stainless steel tips. The ink dries quickly - even on smooth paper - and is smudge proof. Thanks to the clever Plug+Play system, the Slider Rave can use a variety of refill formats. The ergonomically shaped, generously rubberized barrel promotes tireless and relaxed writing without hand fatigue. Details: Blue 0.05" (1.4 mm) stainless steel tip 5 packs (5 pens per pack, 25 total pens) Ink dries quickly and does not smear Slider Rave is produced CO2 neutral Includes sturdy metal clip For ages 8 and up