Our beard care essence kit contains mineral oil, hydrogenated castor oil; Roller: stainless steel. It can promote beard growth and give you a thicker, healthier beard. Its use is simple: 1. Clean and dry your beard, 2. Gently roll the dough with a rolling pin and massage the area where the beard is growing. 3. Then take appropriate amount of serum and evenly smear it on the skin. 4. Use 2-3 times a week for better results. And can promote hair growth of ingredients that help increase the density and length of beard hair.