This is the complete wall fitting connector assembly for the Polaris 360 Pool Cleaner. It attaches to the wall with a bayonet style twist lock fitting and connects to those polaris cleaner hose on the other end. The hose on the Polaris 360 is approximately 1-1/2" in diameter and is corrugated like a vacuum hose. If your hose is smooth and about 3/4" diameter and you have black plastic on the pressure relief (vs. white) then you need the other style wall fitting for the smaller hose, see related parts below. Polaris 360 Complete Universal Wall Fitting Connector Assembly for the Polaris 360 Pool Cleaner.