tender for flexible insulating sleeve (pvc), bore diameter:- 16 mm., wall thickness:- 0.65 mm, length of eachroll:- 25 meter, color:- black, confirming to is:11654(part-1, part-ii) 1986 and,( part-iii/sec-403) 1989 (reaffirmed2005),make:- agroflex /ajoy plastic/powerflex/ giti or similar.