TRIMMER HEAD BUMP KNOB FOR JOHN DEERE S1400 and DC1600 Item specifics: Color: Red. Suitable For: String Trimmer. Type: Trimmer Head Bump Knob. Red bump head knob for John Deere products. Dimensions: 5/16"-18 Left Hand THD. Replaces for the John Deere green knob. Replaces part numbers: for John Deere UP06764, Stens 385-219. Suitable for the following models: for John Deere: S1400 and DC1600. Every Product from HASMX will enjoy 30 days Money-back and 18-Months worry-free warranty. If you're not sure whether it fits your model, please email us-includes your Models and serial number. Note - This is an aftermarket replacement Parts. Any brand name is used solely for the purpose of demonstrating compatibility.