Hromee Air Line Tubing Kit, 1/4 Inch (6.35MM) OD x 32.8 Feet Polyurethane PU Tube and Push to Connect Fittings, 14 PCS Compressed Pipe and Accessories Kit: Amazon.com: Industrial & Scientific
Amazon.com: K&S Precision 3403 Round Aluminum Telescopic Tubing Assortment, 1/16, 3/32, 1/8, 5/32, 3/16, 7/32, 1/4, 9/32 O. D. X 014" Wall Thickness X 12", 8 Pieces, Made in The USA : Industrial & Scientific
2 pcs) - 1/4"-20 x 3.5" High Tensile Black Steel Bolts Screws Button Dome Head | eBay
1-1/4" White Plain End Schedule 80 PTFE Pipe 8'-Length F-P1096