A connector includes a cube, a first cylinder and a second cylinder. The cube includes first, second, third, fourth, fifth and sixth faces. The cube includes a first bore therein, the first bore having a first longitudinal axis. The first cylinder extends from the first face； the first cylinder includes a first hole therein, the first hole having a second longitudinal axis. The second cylinder extends from the second face； the second cylinder includes a second hole therein, the second hole having a third longitudinal axis. The first, second and third longitudinal axes are parallel to each other. In another aspect, a vent element includes a first piece and a second piece that is a mirror image of the first piece, each of the pieces having upper, middle and lower portions. In yet another aspect, a system is configured for removable attachment of an elongated tube to a surface.
