Suitable for Strimmers: These spools are suitable for DUR181Z, DUR181RF, DUR181F001, DUR181F1, DUR181, DUR193Z, DUR193RT, UR3000, UR100DZ, UR100DZX strimmer. PREMIUM TRIMMER LINE: The 8.4m trimmer line allows for a larger mowing area. The and flexible polyamide nylon thread has a diameter of 1.6 mm. It is extremely for continuous work. FAST & CLEAR CUTTING: The replacement spool for the automatic feeding system facilitates the tedious work compared to manual winding coils. It uses centrifugal force and aerodynamics to reduce air resistance and achieve fast and clear cuts. PERFECT REPLACEMENT COILS: They are the perfect replacement for bobbins 196146-9/195858-1. The spool can be inserted and removed without tools. The operation is simple, damage to the device is avoided and the thread is optimally used. Color:Black & White Material:plastic Package Contents: 4 * coil 1 * lid 1 * spring Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.