10mm thick Composite Grooved Rubber Sole Plate for Wider Base PSC Sleepers conforming to RDSO Drg No. T- 8747 for use with Wider PSC Sleepers suitable for 52kg and 60kg ( UIC ) Rails with latest alterations if any as on date of closing of the tender. Specification: IRS Specification No. RDSO/ M & C/ RP- 200/ 2007 ( Provisional ) with Amendment No. 1 of 2018 and latest amendment if any as on date of closing of the E- tender. This is a safety item.