I'm really not sure what this part in particular is actually called, but it goes on the door frame to prevent rattling of the door. The dimensions of the part are .9in L, 2.05in W, .4in H. I added another 2in H one just incase yall need a little more flexibility or just want a little more customization lol. The diameter of the hole is .51 inches and has a little wiggle in the x-axis.