supply of kit for constant polyurethane side bearer pad assembly ( 3-ring ) consisting of 04 items as under:-, kit for constant polyurethane side bearer pad assembly ( 3-ring ) consisting of 04 items as under to drg. no. aal-021101 alt.8 and confirming to rdso spec. no. wd-38-misc-2004 ( rev. 1 of jan. 2008 ) with amndt. no. 2 of sept.2016. s. no. ( 1 ) item no. as per drawing- 3, item description- round plate, required quantity-02 nos., s. no. ( 2 ) item no. as per drawing- 4, item description- pu lining ( set of 02 no. of liners ) , required quantity-01 set, s. no. ( 3 ) item no. as per drawing- 5, item description- poly rings, required quantity-03 nos., s. no. ( 4 ) item no. as per drawing- 6, item description- stopper spring ( embedded to round plate ) , required quantity-02 nos.