It is a soft wood from Malaysia.
Jelutong {dyera costulata} is a hardwood.
Sorva or Couma Macrocarpa and Jelutong or Dyera Costulata are name of trees. Sorva is a tropical tree found in Central and South America and Jelutong in Borneo, Malaysia, Sumatra, and Thailand.
a bum
things that gum is made of
Hard
It is a timber used where a hard wearing surface is required. I have seen it being used on the back of platform lorries.
it is hard and sometimes soft
hard
soft you can bend and hard you can not
why metallic solids are soft to hard
soft