Review on Enhance Your Vehicle's Stability with MOOG K750043 Stabilizer Bar Link by Jeff Rothstein

They are heavier and better than the 2010-2015 Prius OEM from Toyota. They are also easier to install than OEM. You need two, one for each side. I can't remember the size of the nuts they come with, but they are larger than OEM so the wrenches/heads you use to remove the old ones won't be the same ones you use to install. Also raise both sides before doing this work or using a hoist.