The standard servos that come with your radio will be fine for the ailerons...

If you are using one servo, this will be mounted in the centre of the wing with a control rod hooked up to each side of the control horn on the servo. When the servo control arms moves, one side will push and the other side will pull, making the ailerons move in opposite directions...

With two servos, you mount one in each wing with a short control rod link directly to a horn on the aileron. With the servos plugged into a Y lead, both servos will move in the same direction when you move the stick on the transmitter. You have to connect the two servos in a mirror image of each other for the ailerons to work correctly.