Compact Bubble Air Controller reduces air leakage as well as size variation even through puncture. The Bubble Air Controller is installed near sizer ring of plastic extrusion machine to easy operation. The Bubble Air Controller is suitable for extrusion film plant of HM, LD, LLDP, polypropylene and polyvinyl chloride products. Compact Bubble Air Controller is easy to operate and comes in different specifications to suit specific requirement.