Amazon.com: 3/8" ID x 1/2" OD- 100 ft roll - Santoprene Tubing, SantopSeal Thermoplastic Rubber Black Chemical Resistant flexible hose 64A : Industrial & Scientific
EK-Loop Metal Tube 12mm 0.5m - Black (2pcs) 3831109893906
LTWFITTING 5/16 in. I.D. x 1/4 in. MIP Brass Hose Barb 90-Degree Elbow Fittings (25-Pack) HFLF3204025 - The Home Depot
Custom Fabricated Tubing Parts - Custom Needle Manufacturing Services | Vita Needle Company