This hinge set includes part numbers 302S018610 and 302S018620, designed for the upper and lower door hinge positions.It is compatible with printer models M2040, M2135, M2540, M2635, M2640, M2735, P2040, P2235, M5521, M5526, P5021, and P5026.This item serves as a functional replacement to restore door and alignment.