Switch is compatible with DC07, DC14, DC17, DC18, DC21 , DC23, DC24, DC25, DC26 City, DC27, DC28C, DC33C, DC37C, DC39C Origin, DC41C, DC39, DC52, DC54, DC78 and CY18 model vacuums. Replaces Part#'s: 901181-01, 901181-05, 900044-02, 900044-01