Dampner side is 2.275" register with a generous radius to sit down in the dampner, blower pulley side is 2.00" register and over all thickness is .730". Blower pulley side is .250" deep, dampner side is .480". Register washer is made from billet alum. and has a .500" crank bolt hole.
Washer is in like new condition and appears to have never been mounted.
Note: This is a used item. This item might have been taken in on a trade. RBS may have inspected this item and deemed re-usable. There is no warranty expressed or implied with this item.