Air Pump Plate. For use with standard bell jar for demonstration experiments involving low pressure. The plate is made of PVC and has vacuum connection fitting with valve and thumb screw for the return air. Two standard 4mm jack connectors are provided with 4mm jack connectors available inside the jar. Tube Dimensions (Dia.): 10mm. Plate Dimensions (Dia.): 210mm.• For use with 150 mm diameter bell jars only
