This Vented Shelf Kit is made with weldless construction that eliminates liquid or dirt penetration. Kit utilizes Ion-Technology that inhibits the growth of mold, fungus and bacteria. Great for storing food in walk-in refrigerators and freezers in restaurants and kitchen environments. Camguard™ finish won't scrape off, wash off or wear out. Anti-bacterial shelving components are made with rust free, recyclable polypropylene that is dishwasher safe. Shelf is height adjustable at 4" increments. Lifetime Limited Warranty.