supply of portable type welding rod flask without heating coil and controller to keep baked electrodes while welding , portable type welding rod flask without heating coil and controller to keep baked electrodes while welding. the flask should have a capacity of 5 kg and either a circular face with inner chamber dimen sions of 73 x 503 mm (dia) and outer dimensions of 150 x 520 mm (dia), or a rectangular face with inner ch amber dimensions of 70 x 62 x 520 mm and outer dimensions of 117 x 110 x 547 mm. a dimensional tolerance of +/- 10% is permissible. the flask should weigh no more than 4.00 kg and be insulated with thic k glass wool to retain heat for at least 3 hours. the body should be made of mild steel (ms) with a powder coating for durability and corrosion resistance, and accommodate electrodes of 450 mm length. [ warrant y period: 30 months after the date of delivery ] ]