Provided herein are pharmaceutical formulations of dry-powder bendamustine suitable for pharmaceutical use. The first coating layer contains alumina which supports palladium. Upper and lower inserts each house a wear ring so that the respective wear rings are above and below the seals. The upper device portion is angularly connected to the lower device portion by a hinge, and can be folded over the lower device portion and the lid which has been folded over the lower device portion. The model of the user’s interest is applied to the document text as the document is accessed from its source.