This listing includes 10 hinge units, comprising part numbers 302S018610 and 302S018620.These components are designed to function as upper and lower hinges for printer models M2040, M2135, M2540, M2635, M2640, M2735, P2040, P2235, M5521, M5526, P5021, and P5026.The parts serve as direct replacements to restore door and alignment on compatible devices.Installation involves removing the existing hardware and securing these units in their place.This set provides the necessary quantity for multiple repairs or bulk maintenance needs across the specified model series.