This bush for gas joint is for South Korea 

Mechanical Civil engineering castings: Axle housing for special vehicle, planetary gear box, Rear steering gear bracket, capping for bracket & engineering truck parts for export, housing cover for Italy, gas pipe joint bush for UK, nodular flat spade for Korea LG company & valve covers, manhole cover & ring for Germany. As well gas or oil boiler section & heat exchanger , heating castings for USA.