it is a pencil lead,the lead size is 0.5 or 0.7 mm,lead code is B,2B,3B,4B and HB.

description:lead set

meaterial:plasticlead size:0.5 or 0.7 mm

lead mode:B,2B,3B,4B,HB

packing:12piece*60mm in a tube

g.w.:10kgs

customers' bar code and item no can be stick on tube.