This is a set screw lock collar. It is for a 0.438 or 7/16 inch shaft. They are steel and zinc coated. Perfect for keeping your shafts or bearings in place.
Shaft Collars (sometimes called lock collars) are easy to install; the collar provides an easy way to keep your shaft from sliding or your flanged bearing from coming out.
This aluminum heat sink is designed for integrated circuits (IC) of electric components. It's easy to use, and provides the perfect cooling effect for your project.
The Micro Maestro is the smallest of Pololu’s second-generation USB servo controllers. The Maestros are available in four sizes and can be purchased fully assembled or as partial kits.