Inquiry (采购产品): Dust protection I am interested in a plastic doorway guard (standard doorway size) to separate a dusty grain lab from the room where it is graded. Do you have a recommendation and cost per door. While we only need two, if economical, it has a potential for use in all government labs and many commercial labs where grain is being graded. Thanks for any information... **** Hidden Message ***** Jayne Ludwikoski 78402 Company: USDA E-mail: jayne.l.ludwikoski@usda.gov **** Hidden Message ***** jayne.l.ludwikoski@usda.gov