Amazon.com: 1pcs 40mm Outer Diameter PVC Tube Blue Pipe Hard Duct Hollow Vessel Through Pass Column 100/150/200/300/400/500mm Long - (Specification: 40mmx2.0mm, Length: 100mm) : Industrial & Scientific
9.5mm Internal Diameter, 5/16", PVC TUBE CLEAR PLASTIC HOSE PIPE, IDEAL FOR HOME BREWING SYPHONING BEER & WINE FOOD GRADE, FISH POND CAR AQUARIUM AIR PUMP - BRITISH MADE - FREE UK
Medical Platinum Silicone Tubing (1/2" ID x 5/8" OD, 10 Feet): Amazon.com: Industrial & Scientific