The Whedon Deluxe Super Spray Faucet Aerator is great for kitchen faucets. Complies with No Lead laws . Provides forceful spray or aerated stream . Swivels for wider sink area coverage. Includes flow control lever,easily cuts flow to a trickle for extra savings between rinsing dishes, vegtables etc. Exterior Thread Size: 15/16 in. Interior Thread Size: 55/64in. - 27