Ointo Garden Tube Bird Feeder with 6 Feeding Ports, Premium Hard Plastic Outdoor Birdfeeder with Steel Hanger(Pack of 2)

Is this for 2 or 1 feeders? Is not clear the quantity.

Can this item be mounted on a pole?

How many small birds may feed at one time?

are these perches long enough to let a sparrow feed comfortably? Another one I just bought they're flapping their wings trying to get at the food