Tender For supply of mmaw electrode, size: 4 mm dia. x 450 mm, radiographic quality, class - a2 to code: er4211x (medium coated) as per is: 814-'04, amd.-2, reaffirmed 2021. matl. & spec.: irs m: 28 / 2020 . "shelf life to be fulfilled : the shelf life of the electrodes shall be 12 months from the date of receipt i n stores or 18 months from the date of manufacture whichever is more. [ warranty period: 12 month s after the date of delivery ]