For sale is a set of mustache bar washer mount isolators for the early Datsun 240z with R180 differential. These rare parts are used but very nice rarely up for sale

Metal base plate is 2 1/2 in diameter

Smaller center hole is 1/2 in

Larger center is 5/8

Thickness of a stack of 2 is just under 5/8

Metal backing plate 1/5 of a inch

rubber knobs are 5/32

My location ZL baseus box