Some time while transferring the material within the clean rooms of different grades it becomes necessary to protect the material from contamination during ransfer DYNAMIC PASS BOXES are very useful in this.Thse are having HEPA filtered air circulating within the woring area providing CLASS 100 ( ISO-5) environment .lecromagnetic or mechnical interlocking prevents the ooropening at same time. U.v.light provided to kill the microorganism. standard size: 2’ x 2’ x 2’ 3; x 3’ x 3’.other sizes can be made as per order. M.O.C. SS304/G.I.powder coated.