This version of the base is different from the previous version. The ABS base cover (P92N) is held up with the screw (P87N) against this base.
If you are replacing a previous version of this base (which is mounted by a screw threading down from the top, under the drain cup), make sure to order a new base cover P92N and screw P87N.
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.