For two group units. Four hole mounting flange, six pole, 230 mm submersed length, for the super old model M-15. The required gasket is not included.
Attention CA Residents: Prop 65 Warning
WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov.