Aquatic Life Macro Aqua Flow Swing Supplied with a black SLIP PVC fitting which threads into the diffuser, making connection to PVC plumbing easy Also included is a barb fitting for hose/tubing connection Four strong 1-inch suction cups with adjustable bracket means the diffuser can be attached to a flat surface up to a 90 degree bend 100 degree oscillating capability helps eliminate dead spots in any aquarium The automatically changing side-to-side sweeps create natural waves, stimulating growth and carrying nutrients to corals and plants