supply of retro-reflective power block working limit board.retro-reflective power block working limit board.,retro-reflective power block working limit board size: 450 x 450*2 mm with comp lete fitting fasteners as per rdso spec. no. eti/ohe/33a (12/97) rev-8 or latest. rdso drg no. eti/ohe/p/ 7574 rev b or latest. the material for base plate should be aluminum alloy sheet (is 737-1986) and materi al for numerals/symbols/letter should be made of retro-reflective high intensity micro prismatic sheeting (ty pe-iv) [ warranty period: 30 months after the date of delivery ] ] , retro-reflective electric engine stop board with fittings and fasteners size: 900mmx600mm as per rdso drg no. eti/ohe/p/7572 rev. b or latest (drawings shall be only for the ref. of dimensions of le tter, symbols and holes) and as per rdso spec. no. eti/ohe/33a (12/97) rev-8 or latest. the material for base plate should be aluminum alloy sheet shall be of 2.0mm thickness (is 737-1986 or latest) as mentione d in specification. material for numerals/symbols/letter ( letter should be bi-lingual i.e. in hindi and english both) should be made of retro-reflective high intensity micro prismatic sheeting (type-iv) shall confirm to a stm-d-4956-04 or latest, shall have a smooth surface which has the property of retro-reflection. (color: ba ckground in india saffron, symbols and letter in white and rear side of the plate should be black/grey.) [ w arranty period: 30 months after the date of delivery.] [ warranty period: 30 months after the date of deliv ery ] ] , public caution board retro reflective type for public, size-300mmx250x2mm with fittings an d fasteners , as per rdso drg no. re/33/p/7551 rev c or latest (drawings shall be only for the ref. of dime nsions of letter, symbols, holes and sheets) and as per rdso spec. no. eti/ohe/33a (12/97) rev-8 or lates t. the material for base plate should be aluminum alloy sheet shall be of 2.0mm thickness (is 737-1986 or l atest) as mentioned in specification.