supply of manual metal arc welding electrode holder-400 amps, electrode holder shall be suitable for safe heavy duty manual arc welding, welding in enclosed conditions, holding electrode dia up to 5 mm, connecting cable of size: 35 mm square and 50mm square electrode holder shall be open mouth jaw type made of metallic alloy of copper / brass, fully insulated using heat resistant insulators, ebonite or equivalent material and protect against rise in temperature during heavy duty welding and the rise in temperature shall not to be more than 70 deg centigrade.electrode holders shall be safe sturdy, light weight and between 300- 400 grams.holders shall be safe and comfortable for welding and meet the requirement as per is:2641 / 89 or latest issue. [ warranty period: 30 months after the date of delivery ]