Standard pcb mounted transformer surplus from a manufacturer, new and unused
The form is 4-6VA so we are guessing that the voltage output will be about 250mA maybe higher from each output.
Outputs can be combined to make 18 volts or 9 volts with higher current.
A popular voltage and size
Dimensions 38mm x 32mm x 28mm (not including the pins)
Because of the size this has to go by Hermes but you could get 3-4 for same shipping price, if you want to buy several we are happy to pack them and then send you an invoice