Optilume is available in 6 sizes (3 cm and 5 cm length versions, both in 3 different diameters). It is passed over a guidewire under direct vision with or without fluoroscopy, and positioned along the length of the stricture. The balloon is then inflated with a provided pressure inflation device, using saline or water. The inflated device is kept in place for a minimum of 5 minutes, at the recommended pressure, to dilate the urethral stricture and allow uptake of paclitaxel. The pressure is measured in atmospheres, as per instructions for use.