The Class 9038 Type C Closed Tank level switches are bushing mounted. Float movement is transmitted through a quad ring seal. Each switch consists of a basic switch, rod and float. Type C switches are attached to the tank by means of a 2-1/2 in bushing. An external pointer indicates the float position within the tank when the unit is mounted. Switches come complete with bushing, stainless steel float and rod. Occasional replacement of the quad ring may be necessary.