Wal-Rich heavy duty floor and ceiling plate is made of steel with chrome plated finish for enhanced durability. Plate measuring 5-3/8 inch OD comes with spring and is perfect for 2-1/2 inch iron pipe sized tubes.
Using this to cover the hole where a 2 1/2" drain pipe goes through the base kitchen cabinet. The inside diameter (id) of the escutcheon is 3 1/4" making it way too big. Not sure what an IPS dimension identifies but defintely not the id. It was replaced with a 2" IPS that has an id of 2 1/2" worked works great.