supply of polyurethane(pu) foam (or) silicon foam for transverse lower berth of size 55 mm x 670 mm x 1695 mm for ac coaches to icf drg. no. wgscwac-6-1-002, item-5, alt. h/5 and material sp ecification conforming to rdso specification no. rdso/2007/cg-04, rev.01 (pu foam) (or) rdso spec. no. rdso/2013/cg-13, rev.01 (silicon foam) to icf drg no: wgscwac-6-1-002, item - 5, alt: h/5. [ warran ty period: 120 months after the date of delivery ] ] - polyurethane(pu) foam (or) silicon foam