Quickun Brass Hose Barb Reducer 3/8" to 1/2" Barbed Reducer Fitting Reducing Splicer Mender Union Adapter for Air Water Fuel (Pack of 3) : Amazon.co.uk: DIY & Tools
Male threaded brass hose barb connector 3/8" BSP taper Female x 1/2" (12mm) straight hose barb.
Quickun Brass Hose Barb Reducer 1/2" to 3/8" Barbed Reducer Fitting Reducing Splicer Mender Union Adapter for Air Water Fuel : Amazon.co.uk: Garden
Pysrych Brass Hose Barb Fitting Reducing Tee 1/2" Barbed x 5/16" Barbed x 1/ 2" Barbed Reducer T-fitting 2pcs : Amazon.co.uk: Garden
Beduan Stainless Steel Reducing Splicer Mender Barb, 1/2" to 3/8" Hose Barb, Reducer Barb Fitting Air Water Fuel Boat (Pack of 2) : Amazon.co.uk: DIY & Tools
SEAFIT Nylon Barbed Hose Reducer 3/8" to 1/2" | West Marine
1/2 to 3/8 Reducer Kicimpro 3/8 Female to 1/2 Male Adapter Water Supply Line Hose Adapters Compression Fitting Brass 2 Pieces : Amazon.co.uk: DIY & Tools
GASHER 10 Pieces Brass Hose Barb Reducer, 1/2 Inch to 1/4 Inch Barb Hose ID with 20 Hose Clam, Brass Barb Reducer SPLICER Fitting Fuel/AIR/Water/Oil/Gas/WOG : Amazon.co.uk: DIY & Tools
10mm to 6mm Hose ID Brass Reducer Barb Hose Fitting Straight Connector Coupler | eBay
SharkBite 1/2-inch x 3/8-inch Brass PEX Reducing Coupling | The Home Depot Canada