B291B1
  Unit wgt:13g
  L/W/H: 137 /9.5/13mm
  Packing:25pcs/ box,500 pcs/ctn 
  CTN meas: 31x27.5x13.5cm
  G.W./N.W.:8/7 kgs
  Description: * Mechanical pencic
* Colorful aluminium barrel
* Rubberized plastic grip
* Shiny chrome parts 
* Patent code:ZL200830131623.2