supply of polychloropene rubber (grade-f) pad of size 240mm x 210mm x 18mm for + 0 - 1 mm for vgrooved axle pulley of 25 kw alternators. as per rdsos drg.no.skel 4021 alt. 2. the material should be asper laid down clause no. 3.2, 4.1 & 3.2, 4.2 as mentioned in irs r-48-88 .