The Zacuto Rod Riser for Scarlet and Epic Cameras lets you use an optional Zacuto C300 Studio Baseplate with a RED Scarlet or Epic camera. The Baseplate is a flat platform with rods running through it, and being able to use it means that you can attach a follow focus and mattebox to your Scarlet or Epic.
The Riser mounts the front of the Baseplate by two included Allen screws. Two 4.5" female/female quick-releasable rods come included as well.