PHD Inc. is a company that specializes in the design and manufacturing of pneumatic and electro-mechanical automation products. They produce a wide range of products for industrial automation, including pneumatic cylinders, actuators, rotary actuators, valves, and custom solutions to meet specific customer needs. Their products are widely used in manufacturing, packaging, assembly, and other industrial applications. PHD is known for providing high-quality, reliable, and customizable automation components to improve operational efficiency and performance in various industries.