Amazon.com: FOCMKEAS Silicone Tubing 6.56Ft/2m Length 4.8 x 9.8mm/0.19" x 0.39"(I.D.xO.D.) Flexible Transparent Peristaltic Pump Tube Silicone Rubber Tube Air Hose Water Pipe for Pump Transfer : Industrial & Scientific
Air Hose, 2m, Daedalon® - Science First
Gas Hose, Rubber Inert Gas Hose for Argon CO2 Nitrogen Compressed Air Hose, with Brass Welding Union Nut 1/4 Inch, for Commercial, Industrial & Laboratory Application(2m) - Amazon.com