My pool cleaner lost one of its traction belts so I ordered these belts. At first they were snug so I stretch them using boiling water. Now they fit perfectly.Easy installI installed these in minutes much better than original equipmentMaybe it’s just my pool water, but these lasted about 10 months before all the “teeth” wore off the inside of the tread, rendering them useless. I’ll try a different brand this time around and see if they last longer.Three stars because even at $10/year it’s worth having the convenience of a pool sweeper.This worked perfect to replace my worn out ones! Easy to install and climbed the walls with no problem. The pool place wanted $18 for this replacement part so this product was an excellent value.I bought these drive belts because they are the cheapest I could find anywhere on the market and fit the MX eight pool vacuumMy pool Mx-8 stopped cleaning my pool, after its tracks started derailing often. Finally it stopped moving all together. Fortunately all I needed to do was replace the tracks. The old ones lasted about a year with daily use.works great, for the price, fast shipping