We produce and sell all kinds of chalk including high quality no dust chalk,sidewalk and tailors chalk .We can supply more than 10 x 20GP / month .Our product quality has already passed the EN71(1,2,3 items) ASTM-D4236 attestations. Product features: -Non toxic Chalk -Dustless -Easily erased -Smooth writing -Dont scratch the board -Weight 5 gram/stick. According to ISO 9002 Specs. -Available in all colors -Tapered chalk 78*12*10 mm -Straight chalk 80*10.0(dia)*10.0(dia) mm