Solenoid valves come in three main types of the valve body: Brass, Stainless Steel, and Nylon (Plastic). Each has its own benefits. Brass is a sturdy, inexpensive material. Stainless steel is graded for food use, and plastic (nylon) has added flexibility, and is usually the least costly. Take a look at our full line of Brass, Steel, or Nylon valves below.