... Brass ball valve: 1,Size: 1/4".3/8',1/2',3/4',1',11/4',11/2',2',21/2,3',4'2,Certificate: ISO9001 , ... BSP,NPT6)opening /closing tests:20000times Anti-Oxygen glue applied to join body &bonnetSuitable medium: water , non-causticity liquid ... & Aluminium9NutSteel Quality and inspection:Fegular checking on line from production in each workshop, one special inspector inspect the ...