supply of special maintenance kit double check valve.special maintenance kit double check valve.,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 %u2013 1 no./set- consists of: (a) valve as per part no.002421000 -01 no. (b) valve insert as per part no.002701000 - 02 nos. 1.2 piston ring (for 3/4 dc v) as per part no. 002421500 - 01 no/set 2. joint as per part no.002701500 - 02 nos [ warranty peri od: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ] dls/vskp, ecor andhra pradesh 37.00 set