Document GknEY75LRqBvKBD7aE2kGNwN

_I 000061 Jua 29, 1961 Minnesota Killing and Manufacturing Company St, Paul 6, Mlsmsota Subject1 Iten #8200 mtir Masks Gestleasns The product which our applicating contractors' work with contains a percentage of asbestos and we haws recocoended that aechanlaa engaged in tbs application of our products wear a dust filter cask. The Msks which ws supply our contractors as an acceaory with our equipset, arw approved by the 0. S. Bureau of Kinsc as a *Permissibls Res pirator for Dusts, and Pneuaoconicsla-producing Mists*. Our question is wbetber or not the subject naak will provide the required protection, or wbetber you produce a similar disposable aask which provides the required protection. The #8200 Bask Is currently being used by soom of our contractors because of its low coet and coafort. A We would appreciate an early reply. { Sincerely yours, COLOMBIA ACOUSTICS It nRKPROCFEC C0KPAHI JTl/eo ' John T. Winsn Research Depertnant