Green Garde 201-RF Heavy Duty Rootfeeder. Part number 38919. Fits JD9-C spray gun designed to inject under ground at root base. Green Garde 38919 Rootfeeder's pressure is rated from 2-10" deep, work from garden beds to trees. The Root Feeder attachment connects directly to the JD9-C spray gun (not included), item 20095. Not compatible with JD9-GES.