Hot Surface Marking Chalk 
Marks Hot Steel 400° - 1800° F
Key Benefits: Marks will not run, char, discolor, peel or crack.
Marks are weather- and fade-resistant.
Chalk Size:
Diameter x Length
11mm x 100mm
12mm x 100mm
13mm x 100mm
15mm x 100mm
15mm x 150mm
20mm x 100mm
20mm x 150mm
20mm x 200mm
25mm x 150mm
25mm x 200mm
30mm x 120mm

Key Applications: Mark very hot coils, billets, slabs, bars, and ingots. hot surface Marker - Marks remove in pickling baths.
Marks are removed completely in any standard acid pickling bath.
No ghosting image on the metal surface.
Marks on hot steel coils.
Marks will not run, char or discolor.
Package:20pcs/box , 50pcs/box, OEM can accept