Netafim 22500-001220 Black 4.12" Spray Stake 7.0 GPH Flow Rate. Netafim Spray Stakes were built from the beginning to fill the needs of the nursery grower. The spray pattern is specifically designed to match the shape of the pot and provide a precise amount of water and fertilizer directly to the plant. The Spray Stake’s simple one-piece construction provides reliable long life performance with over 15 years of proven field experience.