All PO-300 series Fluid-O-Tech pumps use stainless steel AISI 303 rotors encased in a brass body. Their durable, dependable, three-bearing construction is built to last in industrial applications. Special internal materials, including carbon graphite, are used to eliminate metal to metal contact allowing for long life and quiet operation. The pumps are designed to be directly mounted to the motor with a stainless steel clamp. Specifications: