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Amazon.com: uxcell 6063 Aluminum Tube, 3mm 4mm 5mm OD x 2mm Inner Dia 300mm Length Seamless Round Pipe Tubing, Pack of 3 : Industrial & Scientific
Amazon.com: uxcell 2pcs Plastic Round Rod 5/16 inch Dia 20 inch Length White (POM) Polyoxymethylene Rods Engineering Plastic Round Bars(8mm) : Industrial & Scientific
Amazon.com: MECCANIXITY PVC Rigid Round Pipe 67.8mm ID 75mm OD 350mm Dark Grey High Impact for Water Pipe,Crafts,Cable Sleeve : Industrial & Scientific
uxcell 4pcs Clear Rigid PVC Pipe 3/8"(9mm) ID x 1.3ft, 0.02" Wall Round Tube Tubing: Amazon.com: Industrial & Scientific
Amazon.com: JoyTube Industrial Grade Plastic PVC Vinyl Tubing, 5/16" ID x 7/16" OD Clear Tube BPA Free Air Hose Line, 10FT : Industrial & Scientific
Amazon.com: Ququyi PVC 5/8" ID x 7/8" OD Braided Clear Flexible PVC Tubing Soft for Four Seasons Vinky Tube, Reinforced Vinyl Hose for Water Discharge& Oil Transfer, 6.56ft : Automotive
uxcell 2pcs Clear Rigid PVC Pipe 3/8"(9mm) ID x 1.3ft Round Tube Tubing: Amazon.com: Industrial & Scientific
Amazon.com: TAILONZ PNEUMATIC 1/4 Inch OD Copper Nickel Plating Push to Connect Air Fittings Tee Straight Union Connect TPE-1/4(Pack of 5) : Industrial & Scientific