OD.(outside diameter): 25.5 mm / 1 inch,
ID.(inside diameter): 18 mm / 0.71 inch ,
Thickness: 1.95 mm / 0.08 inch

This transmission fluid drain plug crush washer is for Honda Accord Acura Civic Odyssey CRV CR-V Pilot Fit Element etc.
This 18 mm / 0.71 inch aluminum automatic transmission fluid drain plug crush washer seal is needed to change transmission fluid This is the direct replacement for the part# 90471-PX4-000 90471PX4000