supply of retro-reflective type warning board for neutral section 500 m ( pasted with non reflective sheet in bluecolour and l etters / symbols of retro reflective type -iv high intensity prismatic sheeting in white colour ) as per drg.no.re / 33 / 347 mod-b or lat est conforming to rdso spg.no. eti / ohe / 33a ( 12 / 97 ) rev-8 of size 450x750x2 mm. [ warranty period: 120 months after th e date of delivery ] , retro-reflective type warning board for neutral section 250 m ( pasted with non reflective sheet in bluecolour and l etters / symbols of retro reflective type -iv high intensity prismatic sheeting in white colour ) as per drg.no.re / 33 / 355 mod-b or lat est conforming to rdso spg.no. eti / ohe / 33a ( 12 / 97 ) rev-8 of size 450x750x2 mm. [ warranty period: 120 months after th e date of delivery ] , retro reflective type dj open board as follows, switch off power plate made up of 2 mm aluminium sheet of size 800 x 400 mm pasted with non reflective sheeting of blue colour. lett ers / symbols of retro reflective colour, letters / symbols of retro reflective type iv high inte nsity prismatic sheeting in white colour. ref. rdso . drg. no. re / 33 / 348 mod b & rdso spec. no. eti / o he / 33a ( 12 / 97 ) rev.8 or latest. [ warranty period: 120 months after the date of delivery ] , retro reflective type dj close board as follows, switch on power plate made up of 2mm aluminium sheet of size 800 x 400 mm. pasted with non reflective sheet in blue colour and let ters / symbols of retro reflective type-iv high intensity prismatic sheeting in white colour. ref rdso drg.no re / 33 / 349 mod b & rdso spec no. eti / ohe / 33a 12 / 97 rev. 8 [ warranty period: 120 months after the date of delivery ] => limited