Kept in Mustard, Sandalwood Oil and 28 Herbs for minimum 2 year Mustard oil helps in making the mala strong and it increases the life of mala, keeping the mala dipped in Mustered oil makes mala life up to 100 years. Sandalwood oil helps in purifying the mala, 28 different type of Indian Precious Herbs are used to increase the benefit of this Rudraksha mala up to its maximum level !!