Electric conducting carbon black granule for Keypad 1:Roundness, No Scratch 2:Good stick performance 3:Long lasting life Electric conducting carbon black granule for Keypad1:Roundness, No Scratch2:Good stick performance3:Long lasting life Good conductivity, use for Electronic keypad, Diameter: 2mm-8mmThickness:0.3-0.6mmElectric Resistanc:60ohmm Electric conducting carbon black granule for Keypad