The LOT 3 BITS High Efficiency Spray Aerators includes 2 #BAB1000 and 1 #BAS15CHBK models from BITS LIMITED. These aerators are designed to efficiently mix air and water to create a high-velocity stream for improved cleaning power. Ideal for use in plumbing and fixtures, these aerators help to reduce water consumption while maintaining effective cleaning performance in the home or garden. Get that at my bargain price. Free USPS GROUND ADVANTAGE SHIPPING.