supply of retro-reflective power block working limit boardretro-reflective power block working limit board,retro-reflective power block working limit board size: 450 x 450 x 2 mm with com plete fitting fasteners as per rdso spec. no. eti/ohe/33a (12/97) rev-8 or latest as per drawing attache d. the material for base plate should be aluminum alloy sheet (is 737-1986) and material for numerals/sym bols/letter should be made of retro-reflective high intensity micro prismatic sheeting (type-iv). guarantee c ertificate of 120 months shall be provided as per mentioned specification.(detailed specification is attache d in documents section) [ warranty period: 30 months after the date of delivery ] ]