POWERTEC 2-1/2 in. x 36 in. Long Clear Pipe for Dust Collection Hose & Fittings 70176 - The Home Depot
Aquarium Plumbing - DIN/Metric - Acrylic Fittings - New Life Keysborough
10pcs I.D20~32mm Transparent Acrylic Pipe Tee Connectors Fish Tank Pipe Fittings Organic Glass Tube Fittings Acrylic Connector - AliExpress
Bykski Hard Tube Pipe Fitting Kit Set, Acrylic tube OD 12/14/16MM 90 degree Anti off Tube fitting For PC Water Cooling, BY-HTK at formulamod sale
Acrylic High Clear Tube Pipe Fitting Connector Straight Elbow Tee Cap ID 16-32mm | eBay
Amazon.com: 25mm Inner Diameter Transparent Acrylic Tee Straight Elbow Connectors End Plugs Fish Tank Aquarium Pipe Connection Couplings - (Color: Elbow connector) : Pet Supplies