Super Smoother is a 2-pouch system containing 30 ml glycerine and 30 ml of Sinatin 17 (liquid oak extract). Instantly smoothes and ages 6 gallons of wine. Great addition to kits! - Smooths harsh or young wines, reduces aging time. Sufficient for 6 gallons. Contains 1 fl. oz. total. Stir into finished wine before bottling.