Gem bids for 36 Gun Metal Globe Valves Flanged End 15 Mm Hole Dia As Per Drawing No. Tg-A4-4919 Rev. 2 Gun Metal Globe Valves Flanged End 20 Mm Hole Dia As Per Drawing No. Tg-A4-4919 Rev. 2 Gun Metal Globe Valves Flanged End 25 Mm Hole Dia As Per Drawing No. Tg-A4-4919 Rev. 2 Gun Metal Globe Valves Flanged End 100 Mm Hole Dia As Per Drawing No. Tg- A4-4919 Rev. 2