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uxcell Pneumatic Tubing, 6mm(0.24") OD x 4mm(0.16") ID x 2m(6.56ft) Air Brake Tube Nylon Air Line Water Hose Translucent - Amazon.com
Amazon.com: Quickun Pure Silicone Tubing, 6mm ID x 8mm OD High Temp Food Grade Tube Pure Silicone Hose Tube for Home Brewing, Beer Line, Kegerator, Wine Making, Aquaponics, Air Hose by Proper
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Amazon.com: uxcell 304 Stainless Steel Capillary Tube Tubing 6mm ID 8mm OD 300mm Length 1mm Wall : Industrial & Scientific
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uxcell Pneumatic Air Tubing, 6mm OD x 4mm ID 12m(39.4ft) PU Polyurethane Air Compressor Tubing Hose Pipe Black: Air Compressor Accessories: Amazon.com: Tools & Home Improvement
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