supply of retro reflective sigma boardretro reflective sigma board,retro reflective sigma board 600mmx 450mm x2 mm as per rdso spec. no. eti/ohe/3 3a (12/97) rev-8 (11/2012) or latest and drg. no. ti/drg/ohe/pltbrd/rdso/00036/12/0. [ warranty peri od: 30 months after the date of delivery ] ] , retro-reflective type warning board for neutral section 500 m of size 450x750x2 mm (pasted with non reflective sheet in blue colour and letters/symbols of retro reflective type-iv high intensity prismati c sheeting in white colour) conforming to rdso specification. no. eti/ohe/33a (12/97) rev-8 or latest and similar to rdso drg. no.re/33/347 mod-b or latest [ warranty period: 30 months after the date of deliver y ] ] , retro-reflective type warning board for neutral section 250 m of size 450x750x2 mm (pasted with non reflective sheet in blue colour and letters/symbols of retro reflective type-iv high intensity prismati c sheeting in white colour) conforming to rdso specification. no. eti/ohe/33a (12/97) rev-8 or latest and similar to rdso drg. no.re/33/355 mod-b or latest. [ warranty period: 30 months after the date of delive ry ] ] , supply of retro reflective type dj open board as follows, switch off power pla te made up of 2 mm aluminium sheet of size 800 x 400 mm pasted with non-reflective sheeting of blue colour. letters/ symbols of retro reflective colour, letters/symbols of retro refl ective type iv-high intensity prismatic sheeting in white colour. ref. rdso. drg. no. re/33/348 mod b & rdso spec. no. eti/ohe/33a (12/97) rev.8 or latest [ warranty period: 30 months after the da te of delivery ] ] , retro reflective type dj close board as follows, switch on power plate madeup of 2mm aluminium sheet of size 800 x 400 mm. pasted with reflective sheet in blue colourand letters/symbols of retro reflective type-iv high intensity prismatic sheeting in whitecolour. ref rdso drg.no re/33/349 mod b & rdso spec no. eti/ohe/33a 12/97 rev. 8 firm off er: rdso spec. is eti/ohe/33(8/8