supply of kit for constant contact polyurethane side bearer pad assembly (2 rings). , kit for constant contact polyurethane side bearer pad assembly (2 rings) consisting of following items: (1) round plate and stopper spring (in set) qty.= 01 set as per spec. no. wd-38-misc . 2004, (rev.3) design b (2) p.u. lining (top & bottom), qty = 01 nos each. as per spec: no. wd-38 - misc.-2004, (rev.3) design b. (3) poly rings, qty = 02 nos. as per spec no. wd -38 -misc.-2004, (rev .3) design b. warranty:- the performance of items shall be for a period of 30 months from the month and year of manufacturing.(for details please see spec. no. wd-38-misc.-2004 (rev.3) [ warranty pe riod: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ]