Board surface E140:
black.
![Board surface E140:](/media/cache/31/36/313622cc6a00b595dbcee3e05a0f7582/Mat-E140_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.