An assembly for spraying material comprising a spray device and a spray material container, wherein the spray device comprises: a platform for an aerosol spray container; a casing, a location section with a neck section wherein the location section is wider than the neck section; and an actuator arm located above the location section, said actuator arm being moveable by an electrically powered actuator to move down into the location section; and wherein the spray material container comprises: an aerosol spray canister with an outlet stem on which is engaged an outlet head, the outlet head comprises an inlet section for location in a neck section of the device, the inlet section having a circular opening adapted to engage with the outlet stem, said opening forming a first end of a fluid channel for spray material from the spray material container; and an outlet section adapted to eject spray material and forming a second end of the fluid channel for spray material; characterised in that the outlet head has a location block that is wider than the inlet section and wider than the neck section for location in the location section of the device; and wherein the inlet section has outer surfaces having an oval cross-section with a first, major, lateral axis and a second, minor, lateral axis, said first and second axes being substantially at right angles to one another; and wherein a distance between outer surfaces of the inlet section along the first, major, axis is greater than a distance between outer surfaces of the inlet section along the second, minor, axis, and wherein the spray material container is held on the platform and the inlet section of spray head is received in the neck section to form a close fit and the location block of the spray head is received in the location section with space to permit vertical movement of the outlet head and the location block toward the neck section of the location section. a platform for an aerosol spray container; a casing, a location section with a neck section wherein the location section is wider than the neck section; and an actuator arm located above the location section, said actuator arm being moveable by an electrically powered actuator to move down into the location section; and wherein the spray material container comprises: an aerosol spray canister with an outlet stem on which is engaged an outlet head, the outlet head comprises an inlet section for location in a neck section of the device, the inlet section having a circular opening adapted to engage with the outlet stem, said opening forming a first end of a fluid channel for spray material from the spray material container; and an outlet section adapted to eject spray material and forming a second end of the fluid channel for spray material; characterised in that the outlet head has a location block that is wider than the inlet section and wider than the neck section for location in the location section of the device; and wherein the inlet section has outer surfaces having an oval cross-section with a first, major, lateral axis and a second, minor, lateral axis, said first and second axes being substantially at right angles to one another; and wherein a distance between outer surfaces of the inlet section along the first, major, axis is greater than a distance between outer surfaces of the inlet section along the second, minor, axis, and wherein the spray material container is held on the platform and the inlet section of spray head is received in the neck section to form a close fit and the location block of the spray head is received in the location section with space to permit vertical movement of the outlet head and the location block toward the neck section of the location section. an aerosol spray canister with an outlet stem on which is engaged an outlet head, the outlet head comprises an inlet section for location in a neck section of the device, the inlet section having a circular opening adapted to engage with the outlet stem, said opening forming a first end of a fluid channel for spray material from the spray material container; and an outlet section adapted to eject spray material and forming a second end of the fluid channel for spray material; characterised in that the outlet head has a location block that is wider than the inlet section and wider than the neck section for location in the location section of the device; and wherein the inlet section has outer surfaces having an oval cross-section with a first, major, lateral axis and a second, minor, lateral axis, said first and second axes being substantially at right angles to one another; and wherein a distance between outer surfaces of the inlet section along the first, major, axis is greater than a distance between outer surfaces of the inlet section along the second, minor, axis, and wherein the spray material container is held on the platform and the inlet section of spray head is received in the neck section to form a close fit and the location block of the spray head is received in the location section with space to permit vertical movement of the outlet head and the location block toward the neck section of the location section.