This four-way through-flow sprayer head directs liquid from the supply line to multiple nozzle outlets simultaneously. It mounts on the sprayer boom and distributes the spray mixture to the attached nozzle holders. The set includes five nozzle covers and six gaskets to seal each connection point. A worn gasket or cracked cover causes drips that lead to uneven application and chemical waste. On reinstallation, replace all gaskets and verify the nozzle covers are fully seated to prevent leakage.