Eemax EX176 Braided Steel Flex Connector 3/8'' x 1/2'' NPT Compression
Eemax brand 3/8 inch compression x 1/2 inch FIP stainless steel flexible water line connection adaptor
Hose is 16 inches long, braided stainless steel.
Never use pipe putty/dope or Teflon tape on threaded pipe fittings. Over time, the material tends to degrade and disintegrate into pieces and damage the inside of water heaters, voiding the warranty.