supply and delivery of mechanical joint collars for di pipes and various sizes of ductile iron specials as per is 9523 2000 to its latest revision with isi mark for o and m works on arc basis for the year 2024 to 2025 supply and delivery of mechanical joint collars for di pipes and various sizes of ductile iron specials as per is 9523 2000 to its latest revision with isi mark for o and m works on arc basis for the year 2024 to 2025 , mechanical joint (mj) collars for di pipes , 100 mm , 150mm , 200mm , 250mm , 300mm , 350mm , 400mm , 450mm , 500mm , 600mm , ductile iron specials as per is 9523/2000 flanged and socketted tail piece , 100mm (1 no = 9 kg/piece) , 150mm (1 no = 14kg/piece) , 200mm(1 no = 21 kg/piece) , ductile iron specials as per is 9523/2000 flanged and spigot tail piece , 100mm (1 no = 10 kg/piece) , 200mm(1 no = 23 kg/piece)