Tubing for the original Swing Maxi motor. It has 2 rounded ends and a triangle end. It only fits with the original connector assembled. Compatibility with models, more detail, pics, and buying guide on our blog here
Using this tube on a single breast pump won't convert it into a double, because the single pump does not have enough motor capacity to pump two sides at the same time and you'll wear out the motor.
This tubing ONLY fits with the original connector of the pump, like in the photo below.
if you need a new connector, then you'll need the newer tube: Swing Maxi Flex Tube AND also the Flex Connector x 2, and then they will fit with you old motor