double_stone_slab isnt obtainable

double_stone_slab isn't obtainable through command /give
I tried it on command block as well,but it says ,as copied from command block, There is no such item with name double_stone_slab. However the block itself is still in minecraft if it was already placed. This problem only concerns 2 blocks though the double_stone_slab 1 8 and double_stone_slab 1 9. Attaching 2 screenshots,
To reproduce: either enter /give @p double_stone_slab in chat or in command block