1)body:WCB/Stainless Steel/Ductile iron
2)disc:WCB/Stainless Steel/Ductile iron
3)stem:Stainless Steel
4)gasket:Stainless Steel/PTFE
5)packing:Flexiable graphite
6)telescopic tube:WCB/Stainless Steel/Ductile iron
7)apply water/oil/gas