1.we supply blast furnace taphole drill rod. 2.OD: 32~40mm, Thk:10~14mm ... : ISO 9001:2000 4.market:worldwide We are the blast furnace taphole drill rod manufacture, it is our featured products.We ... big steel mill for deliverying liquid steel specially from blast furnace.3) length: 3~8 meters4) price: $25/pc based on ...