24 Corrugated Hose Tube 3/8 Female Connetor x 3/8 Brass Male Adapter x 1/2 NPT Male/ Female Gas Line for Fire Pit Fireplace - AliExpress

Upgraded 24 Feet 1/2 Inch ID Natural Gas Hose with 3/8 Inch Female Flare by 1/2 Inch Male Flare Adapter, 1/2 Inch Bell Mouth Fittings，Quick Connect Disconnect, for Natural Gas,Propane Equipment

MENSI Propane Hose Accessories Compression Metals Brass Couples Tube Fitting 3/8 Male Flare x 1/2 NPT Male Pipe Half-Union Gas Adapter 2 Sets : : Patio, Lawn & Garden

Brasscraft ProCoat 3/8 in. FIP x 3/8 in. MIP x 36 in. Stainless Steel Gas Connector 3/8 in. O.D. (33,400 BTU)

3 NPT Female Pipe x 3 NST (NH) Male Hose Adapter –

36 Non-Whistle Flexible Gas Line Connector Kit for NG/LP Fire Pit Fireplace ,1/2OD X 3/8ID Hose and 1/2MIP X 1/2FIP Connector - AliExpress

HOME-FLEX 3/4 in. CSST x 3/4 in. FIPT Brass Female Adapter 11-435-007 - The Home Depot

12Ft 0-30PSI High Pressure Propane Regulator with Type1(QCC1) Hose and Gauge,3/8 Female

only fire 24 Ft 1/2 ID Natural Gas Hose with Quick Disconnect for Fire Pit, Patio Heater or Grill - Include 3/8 Female x 1/2 Male Adapter : : Patio, Lawn & Garden

Non-Whistle 304 Stainless Steel Flexible Flex Gas Line 1/2 OD x 3/8 ID 24 inch for NG or LP Fire Pit Hose Connection Kit - AliExpress