Large Flat Top Chrismal/Ambry Holy Oil Set: Height: 10-3/4" 40 oz. each All glass it etched with OI, OS, SC * All glass may have slight irregularities. Additional Information on Holy Oil: OI (Oleum infirmorum) Oil Of the Sick -Used forSacrament of the Anointing of the Sickorwhen praying for sick and laying onhands at healing services/visits. OS (Oleum sanctum)Oil of Catechumens - Used in baptism and exorcism. SC (Sanctum chrisma)Sacred Chrism -Used for anointing afterBaptism and atConfirmation, conferring of Holy Orders, Consecration of Churches