http://www.partselect.com/Schematics/Whirlpool/Whirlpool_Thumb/XSDITZBE.gif
See part 10 in the diagram

SHELF-GLAS

PartSelect Number PS316881

This part works with the following brands: Whirlpool, Admiral, Estate, Inglis, Kenmore, KitchenAid, Roper, Maytag, Crosley, Jenn-Air, Hardwick, Magic Chef, Amana, Caloric & Glenwood.