The Sachtler Mitchell Adapter Piece with Locking Knob is a mechanical adapter for mounting Cine 30, Studio 9+9, Cine 50, and Cine 75 fluid heads on a Mitchell tripod. It attaches to the fluid head with four screws and incorporates a locking knob for securing the connection. The adapter has a diameter of 17 cm and a weight of 0.8 kg. No load capacity, material, height, or power requirements are specified.