Quote Originally Posted by David Lyga View Post
Maris, regarding the 3M type 850 industrial black tape (1"): expensive is not the proper word. It costs almost USD 2000 for a case of 72 rolls!!!! - David Lyga

http://solutions.3m.com/wps/portal/3.../Polyester850/
I encountered the same problem until I found a retailer who would ship just one roll. Even so the roll cost more than $100 by the time it got to me in Australia. At least I now have enough for two lifetimes worth of torn and pinholed bellows!