procurement of grooved rubber sole plate ( grsp ) rdso drg no 4865 & 4159, nylon cord reinforced grooved rubber sole plates 6mm thick for 60 kg 1 in 8.5 turnouts on psc sleepers for rdso drg. no. t-4865 with latest alteration if any, conforming to irs specification for 6mm thick nylon cord reinforced grsp for placing beneath rails at turnouts ( provisional -2020 ( revision 1.0 ) . [ warranty period: 30 months after the date of delivery ] , grooved rubber sole plates 6mmthick for sej on 60kg psc sleepers to rdso drg no. t-4159 with latest alterations if any, conforming to irs specifications for placing beneath the railst-47-2020 ( revision- 1 ) with latest amendment. [ warranty period: 30 months after the date of delivery ]