Sioux Chief 3/16" ID Barb Nylon Coupling at Menards®
Amazon.com: Plastic Hose Barb Fitting, Hose Fitting Adapter for Air Water Fuel 3/16" x 3/16", 1/4" x 1/4", 3/8" x 3/8", 1/2" x 1/2", 5/8" x 5/8" 8Pcs : Industrial & Scientific
Plastic Fittings - Hose Barb Union Splicers 1/8 in. Polyethylene
Amazon.com: Quickun 1/2" Hose Barb Thru-Bulk Bulkhead Fitting Plastic Hex Straight Union Adapter Fitting for Water/Fuel/Air (Pack of 2) : Industrial & Scientific
Male 1/4" BSP Thread Straight Plastic 12mm Hose Barb Tail Water Air Fitting pipe | eBay
Amazon.com: ANPTGHT 1/4” Thru-Bulk Bulkhead Plastic Hose Barb Fittings Union Adapter Fittings for Aquarium Fuel Gas Liquid Air with Metal washers (Pack of 6) : Industrial & Scientific
3/4" NPT to 1" Hose Barb Fitting - Standard 3/4 Thread | SWELL Wakesurf
Poly Hose Barb Fittings – Male Pipe Thread Adapters