12 x STAEDTLER Mars MICRO MECHANICAL PENCIL LEADS 0.5mm 2B 1 x Tube of 12 Leads Easy Erase, Break Resistant Leads 2B 0.5mm Smooth Gliding Leads Jet Black Lines Suitable for use with All Mechanical Pencils FREE UK POSTAGE Free Postage Quoted is for Delivery to UK buyers ONLY, please see my postal costs for delivery outside the UK. Â