I know that but on the front of it there is a black thing w/ writing that says I-----I, <- range, and then in a pointer on something in the middle, like you can adjust it in between. hmmm.
thanks dave for the heads up, not sure why mine had a 4 rib, maybe I'll double check and see i'm retarded, but i'm pretty sure i counted 4, but i'll replace it with a 6.
thanks