This product includes:IR filament sensor 1 (pcs)IR filament sensor-Buddy board cable (1 pcs)Textile sleeve (Length: 220 mm, Width: 5 mm) (1 pcs)PTFE tube (1 pcs)MINI FSENSOR BOX (1 pcs)MINI FSENSOR COVER (1 pcs)MINI FSENSOR LEVER (1 pcs)Steel ball (1 pcs)Magnet (2 pcs)Screws: M3x12 (3 pcs), M2x8 (1 pcs)To replace the part/s, please consult our Assembly Manuals. Make sure to follow the manual for your printer model.