Removed from a military container that held some sensitive equipment.
One (1) used Rubber Mount that's 1-1/4" Diameter x 2" long/tall. The threaded stud is 1/4" and the female end is the same
The rubber is Shore A 45 hardness. If you grip one of these with you right and left hands, place your thumbs together in the middle, you can flex it a little, about a quarter of an inch. You can take your thumb and jamb it in a side about 1/4 of an inch.