Tender For supply of set of commutator bedding stones consisting of the following items. 1) beddin g stone grade medium as per carbone lorraine part no.90673 (m) or equivalent size 120+/-3m m x 28+/- 2mm x 16+/-2mm- 1 no. 2)bedding stone grade smooth as per carbone lorraine part no.90673(s) or equivalent size 120+/-3mm x 28+/-2mm x 16 +/-2mm-1 no. [ warranty period: 30 m onths after the date of delivery ]