supply of procurement of ss wire brush , procurement of ss wire brush 5 rows with wooden handle as per is:4517/1967. specification s: 1. the steel wire is to be made of stainless steel material to grade 304 and of the diameter of the steel w re to be in the range 0.30mm to 0.355mm and length of each strand is 35mm, 75 holes in total and the den sity of strands in each hole (tuft) is 18 nos. 2. the base wooden material (brush head) is to be of thickness 17mm, width 50mm and length of the brush head 180 mm and the overall length including the handle shou ld be 300mm. [ warranty period: 30 months after the date of delivery ] ]