American Type Mechanical Suspension The suspension is mainly divided into mechanical suspension and air suspension.The mechanical suspension is mainly composed of leaf spring, suspension support , connecting rod and u-bolt. The biggest advantage of this kind of suspension is its low price, good reliability and convenient maintenance. Suspension Hangers American traielr mechanical suspension 1:thickness 6 or 8mm 2:leaf spring 90mm*13mm-10pcs 3:certificate ISO9001 4.high quality American Type Mechanical Suspension 1suspension thickness 6 or 8mm 2leaf spring 90mm*13mm-10pcs 3certificate ISO9001 4:color can be red, black, as your requirement