This is a great kit, made from 2" DOM with a ¼" wall and a high quality poly bushing inner sleeve bore is 9/16" or 5/8 which gives you a very thick wall thickness that will not become egg shaped with hard use. This combo is great for any application that you need to isolate vibrations. These can be used for motor mounts, cage mounts, transmission and transfer case cross members and many other applications. Our DOM Sleeve with Poly Bushing comes in three lengths.