supply of special maintenance kit double check valve for e70 brake system as per ftrtil part no- 79000209 consist of following 4 items- ( 1 ) valve as per ftrtil part no- 002421000- 01 no. / set ( 2 ) valve insert as per ftrtil part no.- 002701000- 02 no. / set ( 3 ) joints as per ftrtil part no-002701500 - 02 no. / set ( 4 ) piston ring for 3 / 4 inches dcv as per ftrtil part no.- 002421500- 01 no. / set ( ii ) joints as per ftrtil part no. - 002701500 - 02 no. / set ( iv ) piston rimg for 3 / 4 inches dcv as per ftrtil part no.- 002421500- 01 no. / set as per drg.no. not applicable specn not applicable [ warranty period: 30 months after the date of delivery ]