About this 3D model

I made this little object because the splitter I use on my garden hose system gets to be very difficult to turn. I also need to make very fine flow adjustments to facilitate a water timer used in a system to water many items. I made it on a whim, and in about 30 seconds on Sketchup. I made it big so old hands can have a pain free grip. I made mine bright yellow so it's easy to find. 2-3 shells and 30-40% infll then vapor smooth it. Should last forever.