The ‘Hanbang discovery kit’ was created for those who want to find out which of the four BOJ serums is best for their skin. What are inside? Calming Serum : Green Tea + Panthenol (10ml / 0.33fl.oz.) Glow Serum : Propolis + Niacinamide (10ml / 0.33fl.oz.) Glow Deep Serum : Rice + Alpha-Arbutin (10ml / 0.33fl.oz.) Revive Serum : Ginseng + Snail Mucin (10ml / 0.33fl.oz.)