HVAC OV Eccentric Plastic Duct Connector for 4" inch to 5" inch Pipe Fittings. Adapter for Inline Heating and Cooling Vent ducting. Soft and Straight Pipe Connection. - Amazon.com
50mm/2" ID 45mm/1.8" OD 120mm Wye Pipe Fittings, 1 Pack Y Shape Splitter Duct Hose PVC Connector - Walmart.com
50mm/2" ID 45mm/1.8" OD 120mm Wye Pipe Fittings, 1 Pack Y Shape Splitter Duct Hose PVC Connector - Walmart.com