Clover Thin Line Chaco Liner / Chalk Wheel Liner Marker - Clover Art No. 469 (Blue) Clover Thin Line Chaco Liner / Chalk Wheel Liner Marker - Clover Art No. 469 Easy to use with a screw cap for powder refilling. Leak proof! Draw thin line with clover's chaco liners. Makes nice and neat thin lines Chalk washes or brushes away Be sure to test first on a piece of scrap fabric to make sure marks can be erased