Tender For tender for supply of mc250 3c ext top c c - ismc250 bd ext top stripper guide for groove no 3c. drawing no. mod - 2604 rv00; material c45. "mc250 3c ext top" to be stamped on non-working surface, letter height min 10mm. unmachined surface must be kept free of undulations by grinding. item surface to be cleaned and coated with heat resistant paint.