Product review (1 stars): Did not fit dishwasher drain!
Both ends are identical size. One end fit the connection to the disposal just fine, but it did not accomplish it's main purpose - did not fit the dishwasher drain.

Had to go to Home Depot and buy a "6ft Everbilt Universal Corrugated Dishwasher Drain Hose Kit". It looked almost identical, except one end was slightly larger to accommodate the dishwasher drain size. That one worked perfectly, but it's unfortunate I had to buy the same item twice - lesson learned.