Diamond China Marker Pencil ( 1 piece ) - The improved version of a "grease" pencil.

One of the most versatile and easily used of all marking instruments.

True, opaque pigment marks on all glazed and polished surfaces; glass, plastic, acetate, rubber, metal, etc. Grit-free, non-conductive leads. 

Round, paper wrapped, with string for easy sharpening. 

Firm leads. 6-3/4" long and 3/8" diameter.