Everbilt 1/2 in. O.D. x 3/8 in. I.D. x 20 ft. Black Vinyl Tube HKP004-014 - The Home Depot
LiViliti Healthy Hose Pro Antimicrobial CPAP Tubing - The CPAP Shop
7 Great Benefits of PVC Tube & Hose | Abbey Extrusions
Gardner Bender 1/2 in. Flex Tubing Black FLX-5007T - The Home Depot
Amazon.com: AIRTOON Air Hose Pipe Tube Kit, 1/2 Inch OD×60 Feet PU Air Tube with Push to Connect Fittings, 28 PCS Compressed Pipe and Accessories Kit, Quick Connect Coupler and Plug :
Flex-Tube PU - Flexaust
UDP 3/16 in. I.D. x 50 ft. Vinyl Vacuum Tubing T68004003 - The Home Depot
Tubing & Hoses at Lowes.com
Everbilt 1-3/8 in. O.D. x 1 in. I.D. x 24 in. Clear PVC Braided Vinyl Tube HKP002-PVC006 - The Home Depot