These seiryu packages are discounted because of the coloring and shape. The colors are an in between shade of black and gray. Colors may not all be uniform.
30lb packages will include one large piece typically between 8-10" in lengrh, 2-4 medium stones, and 2-3 small stones.
20lb packages will include 1 large piece, 2-3 medium pieces, and 2-3 small pieces.
10lb packages will include 3-4 medium pieces.
This will pretty much be random selection of stone and what will fit in the box. Please do not send requests when purchasing the discounted stone.