Supply of Depressed Centre Aluminum Oxide Ferrous Metal Disc Grinding Wheel Specification - Dc A-24-T-B, Size - 230 X 7 X 22.23 Mm. As Per Specification Attached.. Depressed Centre Aluminum Oxide Ferrous Metal Disc Grinding Wheel Specification - Dc A-24-T-B, Size - 230 X 7 X 22.23 Mm. As Per Specification Attached. Warranty Period: 30 Months Aft Er The Date Of Delivery Quantity Tolerance +/-: 5 %Age, Item Category : Normal, Total Po Value Variation Permitted: Max 8 Lacs