The AndyMark Hex Molded Spacer 1/2 Hex Bore, 0.188in. Length is an essential component for maintaining the position of parts in custom drivetrains or manipulators. Crafted from durable black polycarbonate, this spacer is designed to resist stress cracking, ensuring reliability in various applications. Its compatibility with common shaft types, including hex and round shafts, makes it a versatile choice for builders seeking precision and stability in their projects.