This is a lightly-used walking running belt for an Nordictrack A2050 treadmill. Like all of our treadmill replacement parts the belt was thoroughly tested on a running treadmill before it was removed and it is in excellent condition and obviously saw very little use. this belt also fits many other treadmills the size is 112" x 20". don't pay them too much for your treadmill Parts why buy new when used will do!?!