Tender For supply of retro reflective calling on board of size : 600mm x 900mm made of 3 mm m.s. sheet, back side supported by m.s. angle. the material must be as per drawing "sdo/s&t/calling-on board /1030 alt-1 dated 26.09.2025. note: approval of sample material should be taken from consignee before bulk supply. material should be supply at consignee depot. [ warranty period: 30 months after the date of delivery ]