The Uni-Ball ‘Thermo Sensitive Ink’ (TSI) gel pen is really something different; a pen where you can erase the ink with a built in eraser – Write, Erase, Re-Write!The Uni-Ball Signo gel pens employ ‘Thermo Sensitive Ink’ technology that enables the ink to be erased and be re-written over. There's an eraser on top of the cap and one on the end of the pen - handy for those that like to place the cap on the end of the pen when writing as you won’t have to remove the cap every time you need to erase something. No more messy crossings out, smudgy correction fluids or thrown out paper.This pack contains 12 of Uni-Ball's innovative Thermo Sensitive pens each with a Medium 0.7mm nib. The sleek, stylish design as well as its practicality makes these pens perfect for the home, office or classroom.Specifications:• Manufacturer: Mitsubishi Pencil Co UK Ltd • Brand: Uni-Ball • Product Type: Erasable Gel Pen • Barrel Colour: Grey • Ink Colour: Purple • Special Feature: Thermo Sensitive Erasable Ink • Nib Size: 0.7mm • Nib Type: Stainless Steel tip, Tungsten Carbide ball • Pen Dimensions (approximate): 14 x 1.5 x 1 cm (L x W x D) • Pen Weight (approximate): 11g • Quantity: 12