This product includes:Stainless steel tank lid (1 pcs)Stainless steel tank lid gasket (1 pcs)Spring (1 pcs)PIN (1 pcs)BUTTON (1 pcs)BUTTON HOLDER (1 pcs)Screws: M3x20 (4 pcs), M3x10b (4 pcs)To replace the part/s, please consult our Assembly Manuals. Make sure to follow the manual for your printer model.