For AQ290, 290DP
Length: 5-1/4″
Width: 1-3/4″
Thickness: 1-1/8″
Mounting Holes: 3/8″ diameter; 3-3/8″ center-to-center.
EMP Aluminum anodes conform to Mil-Spec A-24779(SH)

also crosses with:
Canada Metals CM3588745A
Performance Metals 00112A
GLM 12782
Technoseal 00708AL
Reliance AMD-852835