The small metal cage is about 1.5" long and the sounding tube is 5" long which is flexible. It took many attempts to wear it for the day and Im now able to do so. I definitely feel it and love the sensationof urinating through it. I find though when urinating that I get a steange sensation best described as a water hammer going on until the flow stops. The downside is that the tube remains full even after I've finished and my panties wick out the remainder to such an extent that it looks i peed myself in my woman' shorts.
Ive also brought myself off with a vibrating dildo vibratingvthe cage and tube and my ejaculation just kibda dribbles out the tube but the tube still retains 5 inches of cum.