Black Opaque Acrylic Round Tube – Canal Plastics Center
Black - Electrical Tubing - Wire & Conduit Tools - The Home Depot
Viega PureFlow® 20 ft. x 3/4 in. Plastic Tubing in Black - 35745 - Ferguson
1/3meter Length Diameter7-28mm High Quality Black Plastic Hose Waterproof Corrugated Flexible Pipe Cable Line Sleeve Protecter - Plumbing Hoses - AliExpress
Pack of 100) 1" Round Black Plastic Tubing Plug, (14-20 Ga 0.83"-0.92") 1 inch
Alpine Corporation 1-1/2-in ID x 100-ft PVC Black Vinyl Tubing in the Tubing & Hoses department at Lowes.com
Amazon.com: SBD (Pack of 8) - 2" OD Round Black Plastic Tubing Plug, (10-14 Ga 1.740"-1.830" ID) | GENUINE CAPLUGS USA, 2 Inch End Cap - Steel Furniture Pipe Tube Cover Insert
2"/10-14 Gauge Square Black Tubing Plug - A = 2.00", B = 0.52" | U.S. Plastic Corp.
Black Vinyl Tubing Sold by the Foot - Kuri-Tec - Bulk Reef Supply
Amazon.com: .170" ID x .25" OD Black Polypropylene Plastic Tubing (100 FT) : Industrial & Scientific
Flexible Black Vinyl Tubing | 5/8 Inch | The Pond Guy