supply of special maintenance kit double check valve for e-70 brake system. , special maintenance kit double check valve for e-70 brake system as per ftrtipl part no.790002209 consist of 04 items:- 1.double check valve w/piston ring part no.ft0050398-329 - 1 s et consists of 1.1 valve assly part no.002122500 -1 no./set- consists of: (a) valve as per part no.0024 21000 -01 no.(b) valve insert as per part no.002701000 - 02 nos.1.2 piston ring (for 3/4 dcv) as per part no.002421500 - 01 no/set. 2. joint as per part no.002701500 - 02 nos. [ warranty period: 30 m onths after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ]