supply of axle end cap & backing ring for upgraded ctrbaxle end cap & backing ring for upgraded ctrb,backing ring for upgraded ctrb (6 x 11) class e as per rdso specification no. ab/rb-40- 2016 (rev. 2) of june-2021 make- nei, nei part drawing no. rbsd-7111 narrow rev nil or latest for use on f reight stock. [ warranty period: 48 months after the date of delivery ] ] , axle end cap for upgraded ctrb (6 x 11) class e as per rdso specification no. ab/rb-40- 2016 (rev. 2) of june-2021 make- nei, nei part drawing no. rbsd-7111 narrow rev nil or latest for use on f reight stock. [ warranty period: 48 months after the date of delivery ] ]