Valves of metal, other than parts of machines; Hoppers of metal, non-mechanical; Penstock pipes of metal; Valves of metal other than parts of machines including those from alloy steel and titanium; Stainless steel strainers used in the commercial preparation of foods, beverages, dairy products, pharmaceuticals and drugs; Manually operated metal valves; Metal valves not being parts of machines; Metal storage drums; Metal pipe connectors; Metal pipe collars; Metal hoses for plumbing use; Stainl...