A weatherseal adapted to be installed in a door or window opening includes a spine, a resilient foam core, an intumescent material, and a liner. The photomask includes a transparent substrate and an ion trapping layer formed on a first region of the transparent substrate to trap ions present near the transparent substrate. In order that the balloon catheter can be securely controlled with respect to its shape and position in a patient in a simple but clear manner prior to irradiation, the outer balloon is formed of a flexible, non-extendible material and the inner balloon is formed of a flexible, extendible material. The delivery component may be adjustable in orientation with respect to the nozzle outlet, and may be adjustable to vary a concentration of therapeutic gas delivered to a patient.