Amazon.com: JENSWILL 20mm/0.78" Length Extension Pipe Arm Stainless Steel G 1/2 Male to G 1/2 Female Thread Adapter Cast Pipe Fitting Coupler for Shower Head Arm : Industrial & Scientific
6mm - 20mm x 1/8Inch - 1Inch BSP Male 316 Stainless Steel Pipe Fitting DOLUNTO ( Color : 10mm , Size : 1/2inch ) - Amazon.com
935967-2 Structural Pipe Fitting: Cross, 1 1/2" For Pipe Size, For 1 7/8" Actual Pipe Outer Dia, Pipe | Imperial Supplies
304 Stainless Steel Hose Barb Fitting Elbow 20mm Barbed x 1/2" NPT Female Pipe Connector - Water Fuel Air Brew Pack of 2 - Walmart.com