EZ-FLO 0.5 GPM 15/16 in. -27 Male thread x 55/64 in. - 27 in. Female thread Low Flow AeratorThe low flow aerator allows 0. 5 Gal. of water to flow per minute. Faucet aerators come with a patented internal pressure compensator which enables a consistent output and flow of water regardless of available water pressure. The aerator connects to faucets with inside and outside threads. Chrome 0. 5 GPM Dual thread aerator w male or female threads 15 16 in. 27 Male thread x 55 64 in. 27 Female thread 10 per tube priced each