Product review (4 stars): Very fast, but minor mods needed
The vendor did a wonderful job shipping as soon as I ordered. Much faster than another company that claimed the product was in-stock but in fact waited over 8 weeks to get it from a distributor.

These tracks did not fit directly in my refrigerator. They have extra round knobs on each end that get in the way. After I sawed and filed those down, they fit perfectly. Apparently Whirlpool has changed the design of some components and not others. Now the track fits and holds the drawer securely.