supply of items - gun metal gate valve of size 15mm dia with having iron wheel head and screwed on internally both end type complete 2 gun metal gate valve of size 20mm dia with having iron wheel head and screwed on internally both end type complete 3 gun metal gate valve of size 25mm dia with having iron wheel head and screwed on internally both end type complete 4 gun metal gate valve of size 40mm dia with having iron wheel head and screwed on internally both end type complete 5 gun metal gate valve of size 50 mm dia with having iron wheel head and screwed on internally both end type complete 6 gi elbow as per sample suitable fo size 15mm dia 7 gi elbow as per sample suitable fo size 20mm dia 8 gi elbow as per sample suitable fo size 25mm dia 9 gi elbow as per sample suitable fo size 40mm dia 10 gi elbow as per sample suitable fo size 50mm dia 11 gi elbow as per sample suitable fo size 80mm dia 12 gi reducer socket as per sample suitable of size 20mm x 15mm dia 13 gi reducer socket as per sample suitable of size 25mm x 15mm dia 14 gi reducer socket as per sample suitable of size 25mm x 20mm dia 15 gi reducer socket as per sample suitable of size 40mm x 15mm dia 16 gi reducer socket as per sample suitable of size 40mm x 20mm dia 17 gi reducer socket as per sample suitable of size 40mm x 25mm dia 18 gi reducer socket as per sample suitable of size 50mm x 20mm dia 19 gi reducer socket as per sample suitable of size 50mm x 25mm dia 20 gi reducer socket as per sample suitable of size 50mm x 40mm dia 21 gi reducer socket as per sample suitable of size 80mm x 40mm dia