Green bump knob replacement EGO AH1300 part number Green bump knob fits for EGO 15inch ST1502SA ST1502XY ST1500XY ST1504SF ST1500SF String Trimmer Compatibility: Bump knobs are designed to be compatible with for EGO models, including ST1502SA ST1502XY ST1500XY ST1504SF ST1500SF. AH1300 Bump knobs fits for EGO 15inch ST1502SA ST1502XY ST1500XY ST1504SF ST1500SF String Trimmer Replacement trimmer head shell is made of ABS material quality nylon material to maximize cutting efficiency and durability. Package Includes: AH1300 Green bump knob * 3