Board surface with lineation E129:
grey grid 5cm.
![Board surface with lineation E129:](/media/cache/40/76/40763aca8a83f69a0682e7760390944e/Mat-E129_ME_XX_P01.lang.jpg)
Steel sheet for all specially-coated writing surfaces of up to a width of 300 cm and a height of 120 cm. The vitreous-enamel coating is stoved at a high temperature by a special process. The surfaces can be written on with chalk and magnets adhere to them.