Quickun 5/16" Hose Barb Fitting Plastic Equal Barb Joint Splicer Mender Adapter Union for Tubing Pipe Air Line (Pack of 5): Amazon.com: Industrial & Scientific
Tube Fittings Category | Hose Barb, Compression and Quick Disconnect Tube Fittings | U.S. Plastic Corp.
Universal Medical Tubing Connector 5-in-1 — Mountainside Medical Equipment
altecweb.com - Miniature Barbed Connectors
Adapters & Connectors: Tee Tubing Junction Connector, 1/4"-28 Thread, PP or PTFE Material, 30
Plastic Fittings for Tubing and Hose (1/16 ID - 1 ID) | Omega
Amazon.com: Quickun 1/4" Hose Barb Fitting Equal Barbed Y Shaped 3 Way Plastic Joint Splicer Mender Adapter Union for Air Line Tubing Pipe (Pack of 4) : Industrial & Scientific