1、UPRIGHT POSTURE PEN GRIP DESIGN: Ergonomic three dimensional pen grip corrects pen grip posture, relieves fatigue, and develops children correct pen grip habits 2、SILKY NIB: 0.38mm nib, feel silky, continuous ink, ink does not blot paper, you can use with confidence 3、WEAR RESISTANT PEN TIP: Iridium pen tip, wear resistant, bring durable writing, possess long service life 4、TWO INK SUPPLY FORMS: This product contains a box pen set and 50 black ink sacs, which can be used to replace the pen pouch or ink blotter 5、WITH BOX: Equipped with a storage box for easy storage, portability and access, and also prevent damage and loss 1 x Pen1 x Ink Absorber51 x Black Ink Sac1 x Blue Ink Sac Item Type: Fountain Pen SetProduct Use: Replaceable ink sac pen setSize(LxW): Approx. 13.7 x 1.3cm / 5.4 x 0.5inInk Blotter Size(LxW): Approx. 50 x 8mm / 1.97 x 0.31in Ink Blotter Inner Diameter: Approx. 3.4mm / 0.13in Ink Blotter Outer Diameter: Approx. 5mm / 0.2inProduct Material: Plastic; Nib: Iridium gold