supply of grinding disc with depressed centre of size 125mm (dia) x 22.23 mm (bore) x 6 to 7 mm (thick)type 27 grinding disc of abrasive grain grade a24 and suitable to operate at 10000rpm minimum or 80 m/sconfirming to en12413 suitable for mild steel grinding. make: grindwell norton / carborundum universal/ bosch /3m only. note: 1. the tenderer should be oem or authorized dealer and the authorized dealer should enclose thedealer certificate for the offered make issued by oem. 2. inspection and test certificate for the material clearlyindicating the batch number issued by oem should be enclosed along with the supply. 3. grinding disc shouldhave the residual life of minimum 30 months from the date of supply.