To fit FLYMO Fits Double Autofeed (twin line) models Contour XT, Contour 500XT, Mini Trim Auto XT, Power Trim 300, Power Trim 500XT, Speeditrim GH002, Contour, Contour 500, Contour 500 Power Plus, Contour 700, Contour 700 Power Plus, ET23, Minitrim Auto 2003, Minitrim Auto Plus, Multi Trim 250D/250DX/300D/300DX, Power Trim, Power Trim 500 (product no: 9648596-25/62), Power Trim 700 (product no: 9648597-25/62), Revolution2000/2300/2500 (twin line), Twist'n'Edge