The first belt (Part number 33911) was out of stock with no estamate of availability date. I ordered the alternate replacement belt. It was instock and arrived; with difficultyu I installed the belt. It stunk the entire time the belt lasted; the belt broke in under 20 mintues. This tells me that the alternate replacement belt IS NOT the correct size. The original replacement belt arrived 2 weeks after the alternate replacement belt did. This belt is the cortrect size and so far it is working.