1.  Noise Deadening Pump
2.  Base Plate prevents pump vibration or movement
3.  Long wearing cool coil
4.  Precision engineered swing arm with permanent magnet
5.  Tensile Flex™ durable diaphragm, flexible, high tensile rubber
6.  Unitized valve body prevents air leakage
7.  recessed hinge provides consistent swing arm movement
8.  Air outlet is recessed to protect air shaft