There are currently 20 colors in the line.  The complete set is the Deluxe Set and it is all 20 colors PLUS the blender and Detail pen and it is packed 

in storage case with 10 bonus Super Soft Japanese Brush Nibs inside.  The Deluxe set t is the best set by far for value if bought separately it would be over $134 and we don't sell the case 

on its own right now. Here is the link to that set.

The 5 packs are just the 20 pens broken out into 4 themes -Cool Tones, Earth Tones, Primary Tones and Pastel Tones - They sell for $26.99 

and you can buy all the pens open Stock at $5.99 per