Bins may be porcelain or acrylic. Shelves should feel sturdy, slide easily and quietly, have no rough or sharp edges and some of them should be adjustable. Be sure the shelves keep jars and other items so they will not tilt or fall through. A guard rail on the back prevents items from falling off when the shelf is moved. The refrigerator should have two industry seals.
Underwriters laboratories indicates that it meets safety standards.
The Association of Home Appliance Manufactures seal attests to the accuracy of capacity and net shelf area. Look through the instruction book with details for operating and caring for the refrigerator, before you consider buying. Warranty varies with the manufacturer. It may go beyond the standard one year on the refrigerator plus four additional years on the refrigerator mechanism. Buy a recognized brand from a dealer who services what he sells.