M + 2 to M + 7
MtoM+2
M + 5toM+10
M
18
19
20
21
275x25x13cm
180x20x11.5 cm
225x23x13 cm
250x26x12 cm
hardness and strength
strength and toughness
toughness and wear resistance
wear resistance and hardness
552
783
1352
1455