Amazon.com : FZONE Stainless Steel Lily Pipe Inflow and Outflow Work with 16/22mm Filter Hoses, Ideal for Aquarium Plant Tanks, with Acrylic Pipe Fixer(16mm) : Pet Supplies
Amazon.com: stainless steel tube OD 27mm ID 25mm 24mm 22mm stainless steel 200mm length (OD30*ID27) : Industrial & Scientific