1/2″ by 3/8″ Pipe Bell Reducer – DEA Bathroom Machineries
3/8" BSP Male Thread to 6/8/10/12mm Pipe Straight Connector Pagoda Type Connection Coupling Joint Plastic Pipe Fittings 1 Pc - AliExpress
Brass Pipe Fittings, Water Hose Adapter, G 1/2 Female to G 3/8 Male Reducer Adapter, Compression Fitting for Kitchen Bathroom Faucet, Pipe Connector with Rubber Washer,(2 Pack) - Amazon.com